Remember hardware specs don't matter. I'm just getting hung up on graphics. Yep, that's it. It doesn't make it damn impossible to port a game from a platform with superior specs. Nope, that's all stuff I made up to crap on Nintendo.
The fact that they want to bring it to the NX if possible shows that at least these guys are dealing with Nintendo in good faith. They want their game on a Nintendo platform but are just running into technical limitations. The conspiracy theory is that all third parties hate Nintendo because of some beef from 20 years ago. You can't say that here. They wanted to bring this game to the Wii U but couldn't do it and still want to bring it to Nintendo's audience.