Thing is though, Friender, Cash's dog, is his assistant. They may make them have a sort of "Galford & Poppy" type of thing here (and judging by the way Friender spits fire, while Cash may be free to do something else, that might be the case).
Amaterasu, as a single character by herself, would be a bit more...interesting in this respect. Canine model as a fighting game character would probably make for annoying battles, due to a funky hitbox.
I mean, if you thought trying to fight Rockman, Roll and Servbot in MvC/2 was annoying... :lol
I'd bet that Evil would at least be in, since he was, more or less, Blade's main enemy in the series.
They could make him and Blade basically as different from each other as Ryu and Gouki(Akuma) if they wish, but I REALLY want to see Evil up in this.