Other: New and fresh gameplay that can be be accessible to newcomers of the franchise, but also varied enough for those whom have come to love it.
Basically, something different for a new installment. Like, a new gameplay element. I brought up something on the Klonoa Chat: maybe a Metroidvania-styled Klonoa game?
EDIT: ...Oh, wait. Sorry, I thought you said NEW Klonoa Game. I'm a bit tired ATM...okay, what I REALLY want to see is some awesome remastered music. It's already awesome, but it could always be even more so.