Heroes Premier League

Well, if it's a league, there are home games and away games, meaning you play against SOD/HotA. When playing away, the opponent chooses the version; that would be fair. Both HotA players and SOD players would learn both versions. You could also make paid and free leagues as an option; whichever is less popular would eventually die out. To avoid rescheduling games and other issues, have a specific schedule, for example, a week (or two) to play against a specific opponent. Odd by default is Saturday-Sunday at 2:00 PM; if you don't show up, you lose points and wait for the next game week (allow players to play rounds earlier by mutual agreement). If a player misses more than 3 games, they are disqualified and moved to the lowest league, for example, with -30 points. Yes, you can come up with all sorts of things))).