Roman couldn't return. Roman's fate is player-decided, and it would be very surprising for Rockstar to suddenly come out and declare which ending is canon by bringing him back. (Which would also determine the canon fate of Kate).
It would have been fine though, now that they fixed friend activities so that you do it when you want, and nobody constantly calls you and nags you when they're bored. If they had done that in GTA 4, I might not have hated Roman so much.
I'm just glad they didn't bring back Bernie. I've got nothing against gays, I'm very much pro-gay rights and all but....sweet jeezus....was Bernie one WHINY motherf*cker. That guy couldn't STFU to save his life.
"Get them, sweetie!"
What the f*ck does it look like I'm trying to do, Bernie? I'm flooring it through opposing traffic and sacrificing steering control trying to shoot out their tires. Maybe you'd like to pick up a weapon and do SOMETHING yourself? f*ck... lol