I guess i'll say what I think of what i've seen.
Thor: Looks great, I'll make sure to get it.
Fury: I never liked the ultimate fury, outfit looks ok from what I can see.
Cap: Ok, this mate looks really dumb.
S.H.E.I.L.D. agent: Nice army building minimate, I'm sure customizers will have fun.
WW2 cap: Looks much better, but it's still not the best.
Iron man: I never liked the origin of Ultimate Iron man, but the mate looks Amazing! I hope it has an alternate haipiece.
Hulk: Not bad, but not good.
From what I've seen, Thor and Iron man are the ones that I'll make sure to get.