Welcome! There hasn't been anything done in addition to the ROM hack. I know @EagleXIII and @von Ozbourne have been discussing making a '24 MLH but I personally haven't had the motivation to get that updated as we would need a bunch of graphics work. However, if anyone is good at pixel graphics and wants to participate in a MLH update, please feel free to jump in!!!
Right now we have 23 teams available to modify, I guess a hack to expand to 32 would be interesting adventure, however I remember that this would be quite tricky:
But at the very least a 23 team update for a 2024 Mutant League Hockey ROM can be made for fun. All of the information needed is above.