It's great to see al of your work in one place, instead of trying to find it in many different threads.
Are you planning on updating your Joker or Sandman mods?
For Sandman, he is missing the sand monster skin. The one in the pack appears to be a Cyclops one from MUA-PC. He also appears to be missing his power sounds. Also, I think I could get the voices from Spiderman: Friend or foe, but I'm not sure.
As for Joker, his henchmen are missing, as well as Harley Quinn.
Just a heads-up. I hope you return to modding XML2 someday. It'd rock to have you make a custom conversion of Batman, Green Lantern and/or Hydro-man.