From the introduction:
STILL KEEPING IT SIMPLE
SUPERS! Comic Book Role Playing Game is, and always will be, a simple game. So, you can breathe a sigh of relief that with the publication of this sourcebook SUPERS! is not suddenly going to become a bloated, rule-intensive nightmare. However, I am a fan of options- both for the players and for the Judge. So, the rules presented here are simply further alternatives that, just like all the rules of SUPERS! you can take or leave, to make your SUPERS! game even more fun for everyone.