I want to chime in in regards to the Zelda roster since that’s where all the speculation is right now. I actually believe that there’s a good chance that BotW Link will be his own character in this game. I have a feeling that traditional Link, Zelda, and Ganondorf will retain their TP appearances and we’ll get Champion Link as the new Zelda rep. It would be a little weird to see BotW Link be the default Link while everyone else has their TP forms, and everyone else doesn’t necessarily have BotW forms to upgrade to. Especially in Ganondorf’s case, and; although not impossible, I can’t seem to imagine Zelda’s current moveset being used by BotW Zelda. It just seems like it would be awkward without an overhaul to her moveset.
We didn’t get a new Zelda character in Smash 4 while Mario, Pokemon, and Fire Emblem all got new characters, so it would make sense to think that Sakurai might feel that it’s time for Zelda to get some additional character attention this time around. We all know how all of the other Zelda characters in the past didn’t make it past Assist Trophy status, and I don’t think that any of the Champions from BotW are any more feasible. Two of the five characters on the Zelda roster are already different incarnations of the same characters, so I don’t think it’s unlikely that we could get a third Link. BotW Link already has so much more moveset and mechanic potential that could really differentiate him from the other two Links, and I think just pasting Link’s current moveset onto him would be a disservice to this new incarnation of Link. He is also from a really popular Zelda game that rivals that of Ocarina of Time, so I find it likely that Sakurai would choose him to be our unique Zelda character this time around. It would also explain why he’s right handed in the trailer.
Of course that’s just my own thoughts and speculation, and as always everything I said could be wrong. But I just have a feeling that this is the direction Sakurai is going with when it comes to the Zelda roster. I’ve said in the past that it seems Sakurai feels the best way to represent the Zelda franchise is to include different incarnations of these same characters since that’s what the Zelda games are about, and the possible inclusion of BotW Link would seem to back that up.