I personally think if nintendo works with Playtonic at all, it SHOULD work similarly to how they work with Sega. In otherwords, in contracts, I don't want Playtonic being restricted by having a supporter that can kind of control them however they might feel is within their boundaries because... well they'd be supporting them.
Like I said, something like how Sega made a few sonic games for nintendo for a while, but then now is making multi-platform games again under their own license. Or like Fromsoftware and Demons Souls and how they work with Sony Japan studios when they make a game that's a Playstation Exclusive.
Other than that though, I'd rather Playtonic be it's own big company that makes games by itself
. Rare has always been stuck under control of one company or another, and I'd like to see them free to do what they want for once.