The 16-bit Super Smash Bros clone Rivals of Aether will be coming to Xbox One July 13th. I don't feel bad calling it that, and you shouldn't either after watching the gameplay trailer. This game is for the person who wants to play Smash, but doesn't want to own a Nintendo console. That's probably a pretty small niche of gamers, and the experience is definitely toned down, but it does the fight system well.
Depending on the price I could see a lot of people playing this one. I already have Smash for Wii U so I'm good for the time being.