After the success of Famicom Detective Club, I can see EPD7 working on other neglected R&D1 series, like Card Hero or Kaeru no Tame, while continuing working with MAGES and Mercury Steam on FDC and Metroid. I'm afraid their days as internal developers are over, though.
Tomodachi and Rhythm Heaven could be under EPD4 now, and we could likely see at least one of them soon (co-developed by Indies Zero, perhaps?). As for Wario, I think a new Land could be produced either by EPD2 (if Good-Feel is involved) or EPD6. It entirely depends if someone (either an internal producer or an external partner) is interested in pushing such a game.