If Retro got their hands on Banjo-Kazooie, it'd probably feel pretty natural. Wasn't Metroid Prime littered to the brim with secrets and things to collect? That's basically B-K in a nutshell. Though I've not got a handle on Retro's writing style, so I dunno if they'd be able to keep the classic humour that the franchise was known for.
(to keep my post somewhat relevant, holy hell my hype for this game is over the limit.)
(to keep my post somewhat relevant, holy hell my hype for this game is over the limit.)