Something that would be cool is a fighting game (Traditional or Platform) of Japanese Mascots. You could have Kumamon, but you could also have a samurai cat (Hikonyan), a chick that wears a bridge as a crown (Barysan), or a shapeshifting pony (Gunma-chan). Once I'm done with my KFAD thread, I may make a creation thread about this (Though I would probably expand it to mascots in general).
Nowadays it's all plot, anime girls, and some jokes that don't hit as hard. Way too hit or miss.