I'm bored at work so let's spaculate!
2015 advanced pack
Assuming its 12 (1 a month) like the first one, here are my new predictions for the 2015 one, considering Taskmaster was a surprise release (I had him pegged for the 2015 pack) and it's seeming more likely that both x23 and beast will come out this year (also had them pegged for the 2015 pack a few months ago)
1 - Blade (100%, it was between him and Rogue for this year and since Rogue was confirmed for 2014...)
2 - Iceman (100% they have mentioned him lots of times for 2015)
3 - Domino (100% her model and some animations will be done for the team up, and we have seen a picture of her gear screen as a playable hero)
4 - Wasp and
5 - Vision (100% for both with Avengers 2 out next year, and like Domino, Wasp will have some work done already from the team up)
6 - Magik (100% they have confirmed her many times and work done from team up)
7 - She Hulk and
8 - Spider Woman (85%, both will have work done from the team ups, and both are different enough from their male counter parts to just be enhanced coatumes)
9 - Falcon (75%, again, has half the work done from the team up, and might get the rub from Avengers 2)
10 - Doctor Doom (75% assuming there will be more villains/anti heroes, this seems like a no brainer, especially with all the Future Foundation costumes in the game
)
11 - Elektra (50% I used to be more sure, not so much these days, but still, she has a model in game and fits the villain but sometimes hero theme)
my third villain/hero (assuming there's 3 like this year) was Taskmaster for sure but they screwed that up lol. So I'm going out on a limb and say...
12 - Havok (40% only because he will be done as a team up and I don't see him being just a enhanced costume)
Speaking of the rest of the team up models, Clea WILL just be a enhanced costume, Beta Ray already is and so will be Deadpool the kid. Firestar will also just be a costume, for Torch.