It's a tricky one.
You all know who I voted for.
Raikkonen - seems happy at Lotus, would he want to change teams when there's a radical rule change? Why haven't Red Bull signed him when they've been sponsoring him personally? (I heard after he came back into F1 they stopped sponsoring him). He's near the end of his career, would he want to risk going up against Vettel, someone who's nearing their prime? I don't see it happening.
Buemi - Hell yes I would love to see that happen. But they dropped him from Toro Rosso (god knows why), they've never given him a practice session, the current Toro Rosso duo are probably above him for the Red Bull seat. Love to see antlers back into acton.
Vergne - Hot and cold, inconsistent, and not great in qualifying. Race craft is very good, but he needs to beat Ricciardo soundly to have a chance at getting the drive.
Ricciardo - Has less of days than Vergne, but hasn't shown to have a spectacular race like his team-mate. Has looked slightly better than Vergne ever since they've been paired. But again needs to soundly beat Vergne as has been stated by both of them.
Webber - He's been there for a while, every year after 2010 we ask if he's going to leave the team. He hasn't done so. But will this be the last straw? He's always vocal about the team and unhappy about the situation, then why stay? Think he makes the most of the moaning, would have left by now if the situation was that bad. Near enough retirement age, is causing problems for Red Bull, he's surely got to go from both sides?
Da Costa - Highly unlikely they'll shove him into a Red Bull when he's not had an F1 race, not only would it undermine the Toro Rosso drivers, it wouldn't make much sense.
Hulkenberg - Marko did say he's looking at him as a replacement last year. But there's rumours he's Ferrari tied. Has he seriously just signed a one year contract? If he has, it could be a smart move. He is getting wasted at Sauber who just seem inconsistent, I for one hope he gets into top seat. As for him at Red Bull? Doesn't seem he'll fit into the role.
Rosberg - Hm...I don't see him leaving Mercedes. But if he gets trounced this year would Red Bull want him? Some will say yes as he'll be the "perfect number 2", some will say no since he's not up there with the best. For Rosberg, I think it's "Mercedes for life".
Massa - Hm...don't see him leaving Ferrari unless he gets dropped by them, I highly doubt Red Bull would sign him, unless it's just for a 'filler' year.
Schumacher - He's done it once, he's done it twice, three times? I highly doubt it, although he was getting much better year by year, and 2013 was plagued by too many problems that I feel he's just had enough.
If both Toro Rosso drivers are evenly matched, then I think they'll go for Hulkenberg, if not then Buemi only seems like the logical option but even that doesn't make 100% sense. I just don't see Raikkonen leaving Lotus, although he might if they don't find that 'title' sponsor.