In that case, how about something like CiV: BIG (standing for either (i) Balanced and Improved Gameplay mod or (ii) re-Balances and Improves Gameplay mod). The connotation of the word "big" in the mod's title would be intended to capture the notion that (a) other mods have been combined into this mod and also (b) convey the impression that its creator(s) would appreciate the community continuing to do this in future, consistent with the intention that the mod will evolve as one big community made mod.
EDIT: Possible variations on this theme might be The BIG Mod or The BIG Project where BIG means Balanced and Improved (or Balances and Improves) Gameplay. That way, Civ 4 would have BUG (as in The BUG Mod and The BUG Project), Civ 5 would have BIG.