User blog comment:JoePlay/Rockstar reveals new DLC plans/@comment-2144591-20100721170201

If they have characters from the singlplayer campaign these are the characters they should have:
 * John Marston
 * Jack Marston
 * Abraham Reyes
 * Bill Williamson
 * Dutch van der Linde
 * Edgar Ross
 * Marshall Johnson
 * Bonnie McFarlane

I also think that they should make new multiplayer skins:
 * Mexican Army
 * Bandito's
 * United State Marshalls
 * Zombie