Superior Iron Man, Thor, and FalCap seem to be locks.
Whilst I can keep up with the clues and guesses, I'm gonna play along.
I should point out about Zach's % clue.
He says half are villains (4 out of 8). By referring to 87.5% 'depending how you count it' indicates 7 out of 8.
To me, that suggests 4 certified villains.
3 who can be/have been considered both.
1 definitive hero.
Quite difficult to determine really with all this axis things going on.
Based on that, I'm guessing...
Red Skull/Onslaught
Hobgoblin
Loki
Kang
Scarlet Spiderman (Kaine)
Superior Iron Man
Magneto
Unworthy Thor or FalCap
Has it been said if this wave contains a variant?