Since we're all on a big slime kick, these are all the things I think should be MANDATORY to come backed with Slime Pit:
>Alternate head based on concept art
>Detachable Greco-Roman ruins diorama base
>Slime Pit He-Man
>Slime Trooper (x1 or x2)
>Slime monster mini figure

Maybe s couple optional pack-ins, but only if you could get away with more and not creep over the cost Fright Zone goes for