Thank you.
This is so ridiculously true it's not even funny. Sakurai lets his bias influence his decisions SO MUCH when designing Smash games.
But guess what? Sakurai is a Fire Emblem fan, and lately I've been getting the sense that he's been becoming an even bigger once since Brawl was released. He even acted as the interviewer for this Nintendo FE11 interview:
http://web.archive.org/web/20121021...em.com/shadowdragon/interview/interview1.html
You can tell he really enjoys the series and he goes way back with it... And looking back, he SINGLE HANDEDLY brought Fire Emblem to the world by including Marth and Roy in Melee. There's almost no way FE7 would've been released internationally if they weren't in Melee. And I remember in an interview or something for Melee, that he felt really happy about Roy's design(because FE6 hadn't even been released yet)... Anyway my point is, that he definitely feels a connection with the series.
Plus, 3 FE characters were planned for Brawl. Even if they decided to cut Roy because they didn't have time, it at least shows that Sakurai is not at all opposed to the idea of having 3 FE reps. And just look at another series that Sakurai is HUGELY biased to (and rightfully so)... Kirby. For both 64 and Melee, Kirby was the only character that was released. King DDD was planned for Melee, but was cut due to time restraints. And you know what happened in the next Smash game? BOOM +2 Kirby reps. King DDD, the character that was planned for the previous Smash game, and Metaknight. If we're looking at past trends, then there you go. I very much think a similar thing could happen with Smash 4 and FE getting 2 additional slots and is not at all ridiculous, where they could add Roy, who was planned for the previous game, and another new FE rep.
Anyway, I'm calling it right now. Fire Emblem is getting at least 3 characters in the next Smash game.
tldr version: Yes, Sakurai
is biased. And it is because of that bias that FE will most likely get more than 2 character slots for Smash 4.