Saw another video by NintendoWorldReport with some pretty flimsy translation of the text in the latest trailer. I don't put much stock into it, same as their apparent translation from the first trailer that supposedly reads "Seal Ganon," but got me thinking.
Basically they claim their translations hint at Vaati being a part of things again. While I'm not too confident in their translations it's an interesting idea. The whole Wind Tribe and floating islands check out and could be a factor in this game.
The idea that we might have a conflict again both Ganondorf and Vaati would be pretty epic, not one big villain but two working together could be pretty cool if done well and not another TP situation where there's a somewhat last minute reveal.
The fact that the Glowy Green Arm sealing Ganondorf isn't exactly friendly looking but rather pretty sinister is also something that's bothered me. Its weirdly long fingers, and then just as long nails on top of it, how gaunt and weird looking the arm is, not exactly something that looks very nice or heroic. Nor something that fits the so 10K hero we see on the tapestry everyone keeps pointing to. But that might be the point, looks can be deceiving.
That said nothing about it really seems related to someone like Vaati, though a redesign could always explain things. There's some novelty to the idea that we might be working with one villain to stop another villain, but I have quite a few doubts that would be the case. It's one thing for Vaati and Ganondorf to be at odds and fighting, but another for one of them to come to Link's rescue and lend him their power to fight the other. They're both pure evil, so to have Link team up with one of them, even unknowingly, would be a bit strange. Might work if said arm isn't sentient and just kind of acting on instinct and the actual Vaati is still a villain we face and defeat along with facing Ganondorf could work.