Honestly Rocket league always has the coolest formats, there is 3 splits with 3 regionals and one international and one Major overall (basically like challengers masters and champiosn but there is 3 challengers in wich u gain circuit points for the major but also for seasonal finals). Every split has different formats and there is a 24 team tournament in the end.
I hope riot does something like that aswell, challengers finals are too incosistent imo and having a different format everytime is cool