Yes, that's what SSBU needs. Instead of another Fire Emblem character of which there are already too many, let's have a character from a game where people fight like Fire Emblem characters.
Yeah, I wouldn't be a fan of it, it's just that Nintendo used Smash in the past to promote games, and this release is just so close behind, so it would make sense from a business perspective.
But I have another contender: Travis Touchdown! Complete with the release date for No more Heroes III matching his release at Smash!
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454