I've been dying for a new Onimusha for so long! I really hope Capcom either makes or remakes one.
Onimusha 3 was my favourite; that opening scene was just amazing.
Onimusha Dawn of Dreams was pretty fun as well. Loved the co-op feature and wouldn't mind if they added that for the new game (if there's a new game).
After this, Capcom needs to make a new Dino Crisis.