User blog comment:DerpyDoodle/June 14/@comment-25096445-20150606121823/@comment-24529455-20150606184842

Street Fighter is owned by Capcom, which already has a character (Mega Man) in SSB4. So Ryu would break the one third-party per company trend, although I'm ambivalent about it.

And being from a fighting game, Ryu has a TON of potential attacks, such as the Hadoken, the Shoryuken, and the Tatsumaki.

So yeah, Ryu doesn't make a whole lot of sense, since not only is he from an already represented third party company, he is from a fighting game, which Sakurai doesn't like. But I'd still like to see him in Smash Bros. if only for his moveset potential.

I do agree with Roy, as it would not only overrepresent Fire Emblem, which ain't that popular of a series, it would give us two Marth clones.

We'll just have to wait and see...