While trying to figure out how CTF would work, I came up with a similar yet completely doable (when PvP is out) event! It would be like a mix of Red Rover and Freeze Tag!
Players will get into 2 groups. The goal is to hunt the other team down. When 2 players from opposing teams meet on a route/city, they have a battle. The loser would then be 'captured' and have to go to the winning team's base. If a team has all of its members 'captured', they lose. In theory, this should eliminate the need to chase a player down like in CTF because both teams should be going after one another.
I just need to think of a name for this....maybe Dungeon Siege?