While I personally do like the Strikers style, I don't think it would work well with the project.
I think an art style like the one used for SSB64's boxart would best fit this project. Thick outlines, 2 to 3 shades (with some AA), and thin inside lines.
EDIT: Oh wait, that's not the same style. Well, I still think those basic guidelines would work. Also, while it is important for the art to look cool, it shouldn't necessarily look edgy.
I think an art style like the one used for SSB64's boxart would best fit this project. Thick outlines, 2 to 3 shades (with some AA), and thin inside lines.
EDIT: Oh wait, that's not the same style. Well, I still think those basic guidelines would work. Also, while it is important for the art to look cool, it shouldn't necessarily look edgy.