Lots of interesting stuff.
- It's being devloped by Tecmo Koei as part of their "warriors" series - alognside Samurai Warriors, Dynasty Warriors, GUndam Warriors, etc. Those games are typically a lot of fun, especially in co-op modes. Their biggest problem is that they haven't really changed or evolved since 2001, but they insist on releasing at least one new one every year. It can get old. Luckily, i haven't really played one in several years, so I'm fine with that!
- The game is clearly in an early state. I suspect that a lot of what we were seeing and hearing was placeholder, or rough unpolished assets. It probably is indicative of the final tone and style, though. Those guitar riffs in the trailer? We're totally going to get those in the real game, for better or worse.
- These games are typically unpolished. The trailer doesn't give me hope that this will be any different, but Nintendo might demand a higher bar than usual.
- I do not think it is a particularly good use of the Zelda IP: none of the things that set Zelda apart will be expressed in this game, from the looks of it. It will still be a ton of fun though, it just means that it will likely feel like a coat of Zelda paint on top of an otherwise unrelated game.
- A few years ago, I would have been outraged: how dare they dilute and smear the reputation of this sacrosanct franchise by whoring it out to a mediocre action game dev to make a Dynasty Warriors clone! Did Nintendo learn nothing from Metroid: Other M?!?! ... Luckily, I now value having a good time, and this looks like fun. And I have learned that the quality of a spinoff like this really doesn't effect the quality of other titles or past titles, so... what is there to lose? At worst it will be mediocre and we'll pretend it never happened.