This video reveals a 3rd boss battle, so now its beetle, fire/ice guy, and giant rock dude. But omfg did the train just go underwater? UNDERWATER TRAIN TRAVEL HOLY EFFING BALLS. Also if you check out really closely in the video the sword link is swinging about like a maniac looks quite a bit like the master sword but rusted. What if he is travelling underwater....and unseals Ganon? Could explain why the hell the triforce is running about in that commercial. And could be the plot tweest you know is going to happen.
Wow. The water part looks so cool! That gives us even more areas to explore! (begins to squeal in delight)