I am shocked they let Razhar die. Something simikar happened with Hun in Exodus part 2 in the 2003 cartoon. Leatherhead took him out with a tackle down a bottomless pit. I can assume that he came back undead like Shredder did?
Tiger Claw, a mutanimal as a result of this experience?
Fishface is alive and well still mutated. What about Bebop and Rocksteady?