Starlord (Modern) ~ The best revamp of a classic character in the last decade, Starlord deserves at least a mini bust (in a modern Guardians of the Galaxy MB set hopefully )
This is my most wanted character in fullsize statue form, regardless of scale or manufacturer. He's been popular enough for Hasbro and Toybiz to make action figures of him and been included in a great videogame recently, so I'm stumped as to why he has no high-end representation.
Day 2 of my "generic bad guy" selection, I'd opt for these guys. They're one of Marvel's most visually distinctive "red shirt" enemies, and they'd make a great accompaniment to the MODOK statue. As with the Hydra agents, I'd opt for making these as cheap as possible (hollow, lighter materials, etc), just so people can "army build."
That's how they roll... they've got 4 major X-Men tied up in the back seat, and they still cruise around like a pimp with an arm casually draped out the window!
In line with my last few suggestions, I've got another classic generic Marvel bad guy. As with the others, I'd like to see him made as cheaply as possible (hollow cast, maybe lighter material, simple base, etc), so people can more easily army build. The Hellfire Club has been a major element in the X-Universe, and these guys always show up to be mowed down in mass numbers (Hell, their health insurance plan probably has a "disemboweled by Wolverine" clause!). Think how awesome a few of these guys would look flanking White and Black King and Queen statues.
Thundra (mini bust) - This is one I sorely want. One of Marvel's earliest female powerhouses. Her costume hasn't really changed in the last in the last 40 years and it still looks as good today as it did back in October of 1972!