I wanted a bulkier version of Martian Manhunter than TJ base figures provide. I also wanted a very full cape. Here is what I used: 

Batman & Robin Bane body 
Missle Flyers Bishop head 
Fantastic Four Triton boots 
Fantastic Four Dr. Doom cape 
Iron Man Backlash collar 

The biggest pain in using this figure was cutting off Bane's gloves and rescuplting the arm muscles. I'm really happy with the way that it turned out.