Big Brother 8
Deffinates: Dick, Eric
It pains me to say Dick, but for whatever reason, he was a fan favourite, gives the Allstars name credibility by being a winner, and despite being given such a leg up by America, wasnt a terrible strategical player. I'd be shocked not to see him. As America's Player, I think the chances of Eric showing up are higher than anyones. The only question in my opinion is whether he will be allowed to actually play the game for himself this time.
Possibilities: Jen, Daniele, Jessica
I think Jen is the most likely of these three to come back - they'd be fools not to have her if shes willing to play again. She was a great source of entertainment in her original series, made it really far considering she had no allies, and had quite a lot of fans too. I hope Redmond is right in saying Jen and Dick are sort of ok now, cause as much as i'd love to see her evict him in week 1, it'd be pretty amazing if they alligned! Jessica is clearly still on the BB agenda due to her appearence in BB11, but I think she might have been asked for that as she isnt really good enough for a full Allstars. Also, would she want to play with her ex Eric? Daniele is a possibility, but I think she might end up missing out, especially if Keesha is asked.
Shock Choice: Amber
An outside bet surely, but I wouldnt rule Wamber being asked back for sheer train wreck reasons. Hope not though
Big Brother 9
Deffinates: James
A fairly poor choice in my opinion, but he was clearly a favourite in BB9, and I see him as a certainty just because BB9 needs to be represented, and he was one of the standouts in a rubbish season.
Possibilities: Natalie, Sheila, Matt
A year ago, I'd have said Natalie was a certainty having been in my opinion the most entertaining player in her year, and one of the only players who bothered, but now im not so sure.. I think she might just miss out, especially if they open room for pre-allstars players. Sheila could come back I suppose, but might miss out considering she didnt do much in the game. I sort of expect Matt to come back, especially if there are no good men in BB12. I think he could do well in a different house, and I think AG might think the same.
Shock Choice: Adam
Just kidding... he'll probably be locked up somewhere else by Allstars 2

In seriousness though, I dont think any of the others have a chance in hell at being invited back, though i'd like Sharon to be given a go after she was robbed in her final HoH competition.
Big Brother 10
Deffinates: Dan
If Dan wants back, Dan will be back.

The clear star player since the second wave of games began.
Possibilities: Keesha, Renny, Libra, Memphis
Maybe its because she's one of my favourite players, but I cant not see Keesha coming back. She won the most popular juror, made it deep into the game and was easily the standout female in her series imo. I think the only thing possibly standing in her way is the fact that there are a long list of blondes, but I think she has a legup considering Daniele and Jordan have a lock-in "game partner" which might be considered unfair. I'd be gutted if Keesha didnt make it. Like its been said before, Renny probably faces a head to head with Sheila for the older person slot. I actually hope she would get in before Sheila though - she is far more entertaining, and despite doing little in the game, was far more aware of her surroundings than Sheila, but I see Sheila being more likely as she comes from a series in dire need of representation. Libra could be the dark horse for Allstars. She was a really good player in the opening weeks, and brings a lot of drama. I think that if Keesha is overlooked for another blonde, Libra will be invited back to boost BB10 numbers. Also, I know its not totally politically correct to say, but she might be called back to make the house more racially diverse. Im not trying to cause offence, but I think they probably do look at things that way, and if im right, Libra is in the very front of the queue for black housemates imo. I personally think they should invite back the whole cast though - they were all rather awesome in their own ways.

I think Memphis has a small chance of coming back to be Dan's Boogie so to speak, but he really isnt all that distinctive, and has an outside chance at best.. but then, so did Boogie.
Shock Choice: Michelle
I could feasably see Michelle coming back - she did well for herself, and played a solid game. She's also rather unique amongst the other females that have a chance of coming back, which I think is her main benefit. I dont expect to see her, but theres always one, and she does bring the drama. I think theres the tiniest tiniest chance that April could be back, but when I say tiny, I mean it
Big Brother 11
Deffinates: Jeff, Jordan
I think along with Eric, Jeff is the 10000000% certianty to be back again. I think Jordan is pretty certain to be invited back too, though she's not a total lock. Perhaps a 95%

I cant see her not being back actually, which would be annoying if someone like Michele Noonan missed out for her.
Possibilities: Kevin, Natalie, Ronnie, Michele, Russell
With this being a popular series, and a recent one if Allstars does come in 2011, I could see a lot of contestants representing. Kevin has as good a chance as anyone, having done really well in the game. Plus like Redmond says, he could be the gay guy. I hope Kevin comes back. Natalie is a less likely returnee, but she is still in the running as BB's first supervillain in years. It'd be great if she did come back and then left first!

Ronnie could come back for similar reasons to Natalie, and I actually expect to see him, which makes me very mad. Michele... Maybe. I'd like her back more than anyone from this series, but I think she's an outside bet at most. Her major flaw is having a quieter personality.. Shes one of the best players since BB7 imo, but a lot of the other strong players come with charisma that she really doesnt have.

Russell could come back as a badguy, but im not really expecting to see him.
Shock Choice: Lydia
A useless player, and one of the biggest BB disapointments ever imo, but she did bring the drama. Never before have I ever flipped flopped on whether I liked a contestant more than I did with Lydia. Id love to put Laura here, but she left far to early to be considered. I still have hope that one day they'll do a second chance BB though, cause Laura would be my top pick for that.
Pre Original Allstars:
Im not totally convinced that they would invite early season housemates, especially considering there is an increasingly big list of people who could come back, but if they do, I think some of these are in with a chance.
Marvin: In my opinion the only male star to miss out on Allstars in the first place. Would he want to come back though?
Jun: A totally underated player who should have been in the first Allstars instead of Erika. The only thing is, I read she was interviewed for Allstars in the first place, and didnt make it, so they clearly dont rate her.
Cowboy: Please god dont ask him back, but they clearly want him to return having put him in the running for both BB7 and 11. The reason why goes totally beyond me as he was useless at everything, and wasnt in the slightest bit entertaining, but they clearly want him.
The only other Allstars from this era imo are Jason and Amy, both of whom didnt want to do BB7, and I cant see them wanting to do it now. Id like to see Monica play, but she really has no chance whatsoever, and to be fair, it would have been 10 years since she played the first time - no casual viewers would remember her anyway, and that really doesnt bode well for an Allstar.
My Prediction List:
Men:
Dan
Dick
Eric
James
Jeff
Kevin
Male from BB12
Women:
Jen
Jordan
Keesha
Libra
Natalie (Not sure which, but one of them haha)
Sheila
Female from BB12
I think if theres a third good player in BB12, Ronnie and Libra would be the casualties.
Ideal List: (Not who I personally like, but who I think should play again)
Men:
Dan
Dick
Eric
Jeff
Kevin
Russell
Male from BB12
Women:
Jen
Keesha
Libra
Michele (BB11)
Natalie (BB9)
Renny
Female from BB12