I’ve said this in other threads, but I’d love to see an MMO based on the Romance of the Three Kingdoms and Dynasty Warriors franchise. Beside the fact that I enjoy the historical significance of the game, it would heavily lend itself to some really cool aspects that I feel are missing from other MMOs, particularly the one I’m in now, WoW.
I’d love to be able to generate a character of humble origins and not only work my way up in terms of experience and gear, but also notoriety. That is, not just “oh, I’ve played with this person before” but actually in a way that effects the way the game is played. Not only do you perhaps gain favor from some people, but also fear from others. You’d actually have to work in diplomatic skills, bargaining, and such.
It would be cool to be able to free-lance and change factions through your actions, which you cannot do, at least in WoW. Say, for instance, in WoW, I meet someone I’d like to play with, but find out they’re the opposite faction, unless one of us rerolls, we’re boned. What if I could perform certain quests that would let me change sides, which would simultaneously effect my notoriety as someone untrustable by certain other factions.
It would be really cool if certain geographic areas could actually change hands between various factions, as they would historically. You may be safe from being ganked somewhere one day, but if you go back there a week later, after a particular faction attacks it, it may be like being in contested or hostile territory in WoW PVP servers.
It would also be neat to actually have some what of a RTS component to an MMO. We’re not just a group of players raiding a dungeon, but each of us has specific tasks, or commands troups in addition to our own duties. It would put an interesting strategic element to battle, particularly RTS component isn’t centrally controlled, but actually involves a large amount of cooperation from all the players in the battle.