WiiU had 3rd-party-support at launch. But it didn't sell much. Visually improved ports sold good on PS4 (Tomb Raider), but not on WiiU (Need for Speed). It seems Nintendo-customers have different needs than customers on other platforms. If 3rd-party doesn't cater to these needs (and I don't see why they should change), they will not sell and therefore they will not support.
There are thrid-party games that sell well on Nintendo-plats, but mostly it needs special effort and special consideration. So I can't see good 3rd-party support in the near future.







