Last time on Dragonball Z...
Taking a few days off from the mammoth publicity tour for Marvella II, Peter and MJ decided to go check in on Curt, who's wife had recently died. They arrived at Curt's run down home where Connors persuaded Peter to come to his lab out in the Everglades. MJ tagged along as she was tiring of autograph hounds interested in her celebrity status. MJ wound up wandering into the swamps to do some sight seeing and was attacked by a python, but was rescued by Bruce. Bruce and MJ come under attack from an alligator and in the ensuing mayhem, Curt is injured.
Bruce turns into the Hulk and deals with the creature, and reverts back after a brief skirmish with Peter. Bruce had come to see if Curt could help him control his transformations, but now Curt's in bad shape so they return him to the city where Bruce volunteers to transfer some of his blood into Curt. The process drains Bruce and he collapses, so Peter decides to put some of his own blood into Bruce so he can recover. Curt transforms into the Lizard and attacks his doctors, and that's the story thus far.