lol at people trying to downtone the news.
first of all, both Tales and Taiko (no details yet) sfar have been confirmed to be released within te end of march 2018.
These 3 new switch games should instead be additional, to be released after those 2 (alo because a Tales of game and a Taiko game have already been announced, so no need to call them "3 big games", now).
Plus, the source specifially claimed these 3 games to be exclusive, with mutliplatform games also to be in development, with a shifting of internal resources toward Switch.
Now, they could totally be "casual" and "not core" (big by company terms could totally be different from what WE could think about that definition)
and they could totally be "second party" game, such as Pokken or Smash (with Smash port being rumored, it could totally be), even if I don't know if Namco claimed the SMash U/3DS games as a proper own Namco game, honestly)
and they could totally be some sort of "For Switch" old port releases, such as Dragon Ball Xenovers 2 FOR SWITCH, that they consider as a separated version, so coul dtotally be a Tekken 7 FOR SWITCH game
but stil...