On the hopes this is being shared with Capcom (or they’re watching)… I’d pay for the following:
Maki (Up to $10): I’d love to see her come back with a few tweaks to make her moves/commands a bit more user friendly. She had an inventive variation on Guy’s general style, and she’d be a good fit with some redesigning/tweaking to fit SSF4.
Q (Up to $10): One of my favorites, and his mix of sudden bursts of aggression after long periods of defense are interesting.
Lucia (Up to $10): The kick-based fighter in Final Fight 3. I’d pay a bit more since I know they’d basically have to design a new character from nothing, as opposed to having some basis (“Let’s use X/Y/Z’s appearance in a previous game, and build from that for their SSF4 version.” “Sure!”).
Alex (Up to $8): Offers a good mix of moves. Some grappling, some close fighting, some poking. I like his overall design.
Karin (Up to $8): I like her overall design and game play flow.
Rolento, R. Mika, Sodom, and Hugo (Up to $3 apiece): Not hugely interested in them, but I’d live with them if they’re added and probably buy them. Might go as high as $4 or $5 apiece if I had to, but they’re mostly just “Ehh, I’m cool with it since it’d make others happy” choices on my part. Maki, Q, Alex, and Lucia are my big choices.
And yes, the prices I’m willing to pay for some characters are clearly outrageous. I’d honestly prefer something more like $5 each and think that’s more fair by far, but I noted the higher totals to show my extremely strong support for them; if I ‘had to’, I really would buy them at those prices. The rest… eh, three to five bucks is about right to me.
Edit: A few pages back, Jushiness mentioned Kyosuke. I’d be cool with him being added too, if Capcom’s up for it.