So here is an updated scenario.
Gamecube 2- Normal controller, designed aesthetic similar to Wii/Wii U, as powerful if not more so than the PS4 and Nextbox, Decent online, several of Nintendo's more core IPS (Metroid, F-Zero, Starfox, Zelda), updated wii mote to appease casuals/ for games that work well with motion, Third party exclusives, and all the big multiplats. Around 350-400 dollars at launch.
I think it would do MUCH better than the Gamecube. PS2 essentially sucked the life out of everything else, and the Gamecube had a few quirks that really held it back, overall though it was a very core focused system. I think that the GCN2 would sell well.







