this was already suggested several times, a GBG Champions League that is cross server, Inno claims they can't afford Cross-server, lmao, wonder what they did with the 1 bil they made in 7 years ... they also claim it's hard to do, still, creating such a league, doesn't solve the fact that MMR is broken and flawed, and that the other leagues would pretty much be the same as they are right now, and hell, even the challenger league would still be sorted by LP and Guild ID, which is flawedThe way to solve it would be to make a top league called iridium or something where the top guilds in each world compete in a knockout competition to be the top guild in the game with awards and prizes etc. It would give a real challenge to the top guilds that you can't get in your own world and make the top level a little bit more than just farming. The problem with the current competition is its just the same every week there is no eventual "winner" so all you are playing for is what you can win from as many battles as possible etc.
To make it a world versus world competition you could allow any four "top" level guilds from a world to join together and fight four guilds from other worlds, so it could become a true world versus world competition. (i would say the top four guilds from a world join together but they usually hate each other lol so that would not work, better to let them choose).
The first option would just be a blood bath but the second option would require teamwork and strategy which would make it more interesting and the bragging rights to say its the top world!