Sadly, he won't be a playable character.
What makes you think so? Do you have confirmation?
CLOSE THIS POINTLESS THREAD.
Yes, Rain makes a cameo fighting with Blaze at the Pit II again.
Sure it's Rain and not Hornbuckle?
Curveball! Hornbuckle WAS Rain all along! Rain is one of Onaga's Holy Disciples!
(I mean, I'd honestly go for it. The biggest problem is... Rain wouldn't be caught dead in green...)