My idea was similar to what Jonna has come up with, although with less emphasis on the blockade. :P
Kind of like FMA, everyone teams up and attacks the villain's home base (Mount Scary) and everyone fights their own battles. Someone can fight Vladek, someone can fight the evil Thingguys (if that's still a thing), someone can fight Menaya Kull. Iamos can fight the blonde dude mentioned in Ironsides because... reasons. :P
Then at the end who ever has not kicked the bucket can work together to overpower TheDude.