Natalie. I get a feeling she might be the Denise of this series though. She will, deservedly, avoid being voted out by the judges but the public might rally against her for being ahead in terms of ability from the start.
Abbey should be there providing there are no major blunders. She is very, very good. I'm also finding disparaging comments about her accent and background on other websites to be very nasty and uncalled for.
I would have said Sophie but she has to inject more personality into the dances come the business end of the competition. If not her, then I would say Susanna.
There will be one man. I would think it would be Ashley but as said, the only thing that could go against him is his schedule and if he wants to win, more time needs to be put on the dance floor. One could criticize Ola (not me though, my hormones do the Rumba whenever she comes on and I hope there is such a thing as reincarnation/parallel universes so I can return as James Jordan) but she basically choreographed something she knew would get them through with the time they had and couldn't make it overly complex. I suppose that although Ashley has confidence issues by the looks of it, at least he's better to dance and be around than Sid "face like a wet weekend in East Grinstead" Owen.
If it's not Ashley, I can see it being Ben or Mark. I don't think Patrick's public support will last him long and Ben and Mark are possibly the "journey" contestants due to their physical limitations.
I would say Ashley is the likeliest man in the final, followed by Ben, then Mark then Patrick.