What does TWEWY stand for? The world ends with you? I don't see the kingdom hearts connection with that game. But then again, havent played it. Played kingdom hearts though.
Fire Emblem would fit well, but it's a completely different genre of game, so idk how it would work...I'll be original and say Spyro, not a nintendo franchise but meh. Both it and Zelda are action/adventures, only Spyro tends to have more platforming. I've already made a Dragon Link concept, so why not? There are a few humans in the original trilogy, but not pointy eared ones. The Legend of Spyro trilogy, however, has none in sight. I'm assuming the humans in there are extinct, a few of the enemies are ghost knights with armor. Link has already traveled to other worlds(MM) so it would be interesting to see him in Spyro's world. The dragons would be like: "A human? I thought you guys have all been dead for millions of years!" Maybe some of them would even try to attack him, I don't think the relations between dragons and humans were very friendly. But then they would find out that this human means no harm and has been sent to their world to help take down some unspeakable evil...or something.
Spyro and Zelda are more similar than you might think...Link has a small glowing companion in a few of the games(Navi, Tatl) and Spyro has a small glowing companion(Sparx).