As it is, they may want to actually work on the ones in Smash like F-Zero. Or, hey, completely revamp Ice Climbers into an adventure game. Not saying I'm opposed to Golden Sun (it's first or second party, I'll take it), but not everyone is a Marth or a Shulk.
And for Xenoblade's success, it doesn't seem to have been rewarded well in Smash, but either way, yeah, Shulk is a pretty big case for using Smash to turn a series around. Or, in that case, creating a series might be the case depending on the initial plans for X.