dont want to be harsh but western third party support will never be a solid form point for a Nintendo console anymore, neither home nor portable.
Even if they got the right hardware, software, input mechanism, online services and business practices in place (factors that have been barriers to this kind of publisher support for most Nintendo consoles since the SNES to varying degrees), they would still need to demonstrate evidence of a userbase that will actually reliably spend money on these kind of games before the likes of EA, Activision, Ubisoft give Nintendo platforms consistent and comprehensive support on a par with what they give Xbox and Playstation.
I don't think this is really feasible in the immediate future, but they can perhaps get all their ducks in a row to be in a better position to achieve that in the long term.