Actually Link did, as it was there before Ravio moved in. Either way, I think that's a bit different. The Mask was a bit out of place there, as a possible way to tease the idea, while Bayonetta has various Nintendo themed costumes and is probably just someone at Platinum having a bit of fun. It's not impossible, but it really does seem like fans making something out of nothing.
At the very least, if Platinum did make a Metroid, I'd probably enjoy it a lot more than MPH or Other M, even if it's not a very good Metroid game.