SuperLeviathan
Member
That's what I'm mainly referring to. The same would likely apply to the Ice Climbers if they weren't as far along as we thought they were.
I can't say for sure, but I'd really have to imagine there's a certain compatibility for stages. Save one (because of the difference in swimming physics), every single DLC stage made it to both versions, even a complex beast like Mario Maker.
If the assets are there, Sakurai doesn't need to be completely hands on to get them working on the NX.