I dunno if there'll ever be a new story mode, but if there is, at least textual dialogue would be preferable. The first time through Subspace Emissary, I found it really hard to follow because of the lack of dialogue.
I'm gonna sneak in an edit and say that I really don't hope Sakurai hands the reins to Smash Bros. off to someone else, since I feel like he's Lip's only chance at making it into the series. He's mentioned liking the Panel de Pon series before and it's more than obvious that the rest of Nintendo is content to let it rot, except for some minor nods like the New Leaf cameo. I don't know, it could happen, but it's unlikely.
Win vs. Yoshi: "I dunno why, but when I see you, I get really mad for some reason."