Davina herself said that if Channel 5 had accepted the rights to BB earlier than they did and offered her her job again, she would have strongly considered it, although she did say that she spent a year preparing herself to say goodbye to the show when the announcement of BB's cancellation on C4 was made in BB10.
I'd love to see her on BBBOTS. She did see last summer's CBB, based on the tweets I saw (and plus Julian Clary's a friend of hers), so I think she'd make some useful contribution to the panel.
Awww you're making me feel sad.
Damn you C5, why could you not make Davina host! I miss her so much.
If she came back, I would forgive C5 for everything they have done wrong so far.