I'm surprised at how quickly this turned into a wish list of completely unrelated characters. That being said, a few of these request sound nice. Developing a full moveset from scratch would be incredibly time consuming, so I seriously doubt we'd see anything from as far back as Altered Beast, Streets of Rage, or any character with a basic moveset. At best we'd get characters from an existing 3d franchise that already has depth.
I don't wanna get my hopes too high, expecting some steady stream of FREE dlc characters. I'm still hurting from my false hope in SCV. They mentioned Bayonetta and then crushed it because they didn't have time to develop proper animations for her hair. We were stuck with just alternate costumes from the designer. Every asset cost money and when you aren't charging, it's gonna limit how much you provide. I'll play it easy on this one so I can be extra hype if they actually do announce something after release. I'm really hoping they do.