But people WERE mad about Cloud. If you scroll down in this very gallery you’ll find tons of images being posted to defend Sakurai’s decision and tons being posted to mock the guy.

Besides, Corrin's got a lot of stigma besides that, including being the sixth Fire Emblem character, the sixth Fire Emblem character to be a swordsman, being a character in a game that's not out yet outside of Japan, being by some accounts a pretty bad character in his own game, and being yet another Counter user.

Where have I heard that before…(COUGHCOUGHROYCOUGHCOUGH).
However, where Roy's inclusion in Smash helped Fire Emblem get ported over to the west and a decent marketing strategy, Corrin's inclusion just means now there's 6 Fire Emblem reps where we could have had reps from any other series. But I guess Sakurai just loves his Fire Emblem, and it's his game, so he chooses ultimately who gets in.