Feel this is worth the new thread so that the other one can be about the game itself coming out in May and whatnot.
Platinum for whatever reason never fully confirmed what the status was regarding ownership of the IP. If this is accurate, then Nintendo seemingly indeed sold their stake in the IP. No clue on what Nintendo got for it (not much if it was a poor seller? How does it work?). PG went on record saying that Nintendo were 100% onboard with a remaster, but told Platinum (obviously) to either do it with them, or to do it elsewhere alone. Somehow, some way, PG convinced Nintendo to let them do the latter in a very unprecedented move, and the rest is history:
So yeah, now we seemingly have a better idea of what went down.—Why did you decide to bring The Wonderful 101 to new platforms? Did you talk to Nintendo about a port?
Kamiya: "We felt it did not quite reach the audience that it deserved. As creators we are very confident in the game. This project is a unique opportunity to bring the fans together and see how far the game can go, which is why we went the crowdfunding route. We did speak with Nintendo about it initially, but they said, 'you either do it only with us or do it yourselves.' But speaking with them they allowed us to cut a deal, so we took upon ourselves to start this project. Dangen Entertainment is helping us. We have seen successful campaigns in the past, Bloodstained in particular, so we saw it as a very unique and interesting opportunity."
NOW, it is slightly possible the copyright is only for the "Remastered" version, but I very much doubt that, in case anyone brought this up. That's not how it works IIRC. Nintendo would have to still be named if they co-owned the IP/copyright here.