Not sure where else to out this, but would love to see a 1v1 captain/battle mode, where you command hundreds of ai troops against another human general (similar to custom battle, but preferably like the enhanced battle test mod but online, so a limited number of others can have the option to join as co-commanders or sergeants). Have seen it on other forums claiming it will be in because it was in earlier m+b but no confirmation on here and not sure if this will come with custom server files etc, but would be something I'd love to see.
This may be a different game mode, but this is most relevant on forum at the moment/might be planned in captain mode.