Bad comparison considering RE5's DLC came out a year later from when it was originally released-- until that all that was there for RE5 was Versus mode.
Plus, Mercenaries Reunion didn't feel all that thought out, in my opinion. Half the roster were just the alternate costumes for Chris and Sheva and you could not play with any of these these characters in vanilla Mercenaries or survivors. If they're going to do that in 6, they better make the old characters compatible.
Yeah, instead of releasing more EX-3 costumes or whatever, Capcom should really include old characters. Here are some ideas:
1. BSAA Jill/Battlesuit Jill: BSAA Jill can have her unique Px4 handgun and even a rocket launcher like Samurai Chris. Battlesuit Jill can be the brainwashed MVC3 version where she can get into Feral Stance (kinda like Jake's Hand-to-Hand mode) or even use two machine guns simultaneously CDG Move: Front - Flip Kick; Back - Cartwheel Kick
2. Tribal Sheva: This Sheva can have her trademark bow and arrow except the arrows will be limited like Ada's crossbow. She can also have the grenade launcher. :-) CDG Move: Front - Spinning Jump Kick; Back - Spinning Back Kick
3. Wesker: He can be the boss version or just the regular RE5 version. He can get into his own Hand-to-Hand mode where he can do the matrix-like dodges and run much faster than Jake. CDG Move: Front - Rhino Charge; Back - Ghost Butterfly
4. Claire She can have her "Mercenaries 3D" moveset. I can picture her w/ a standard handgun and also a shotgun. I can picture her CDG move being that badass kick/shot she did to a zombie in the first CG RE movie.