Check out 'Super Teams Super Bases' by Scott Moore. A great resource for creating complex well-oiled Super Teams and awesome Bases for them to occupy! You can safely purchase the pdf for only $6.25 from our paypal powered shop.

While created for the 4C system the information contained in the 33 page supplement is easily converted into whatever system you are using to power your Super Hero campaign. Scott took a higher level look at Super Team and Super Base building and fills in the blanks that most games leave empty.