I think Iceman and Archangel are the 90's X-Men that need updates the most. The wave 10 and 19 figures were good for their time, but they could both use a lot more detail, as well as some new ice effects for Bobby.
Jubilee could reuse the hair sculpts from her Strike Force variant, and Bishop would look better with a sculpted scarf.
Blind bags and box sets at my LCS have both had higher prices per minimate than two packs. I'd be fine with new formats, so long as the value was at least equal to that of the two packs.
I picked Executioner, since he's a classic Master of Evil and we already have Enchantress. Ulik or Malekith would be great too, but I'd pass on the others.
I didn't know the Marvel Frost Giants weren't always blue, but they were my choice.
I'm glad Hulk has his tiara, it wasn't really clear from the other pictures.
I wasn't expecting Surtur's fire to be transparent. Hopefully it'll look alright.
Most of these don't really interest me at all, but I'd definitely take Nuke, as well as Hyde to add to Helmut's Masters of Evil.
I've only heard of the Chaste from the Daredevil Netflix show, but I wouldn't mind more ninjas.
We've gotten Iron Men and Victors von Doom, but never an Iron Doom.
Rogue, Gambit, and Iron Doom all seem like solid guesses to me, which leaves two new Spidey villains and a new Iron Man villain. If Rogue is right, then all three of them must be male.
I have a hard time thinking of Mimic and (especially) Changeling as X-Men, but I guess they count. A classic Mimic minimate would be great, but Changeling is probably the least interesting to me of these options.
This is my favourite of these polls so far. I'd love any of these options.
As much as I love Kitty Pryde, I need her training uniform (my #1 want) before the green costume, so I have to go with BoM jumpsuit Rogue (my #2 want).
I'd only be interested in the Starjammers if they were all going to be made, with the exception of Binary, who I'd be fine with on her own.