I used Color Magic, and S4PE to create this mod, both can be found here on this site. The pants can be found in the Skin Tight section, and the color options there select between the Modern version (current comic book version), and the traditional version.
The top can be found in the Tee-Shirts section, the color choices on the shirt are between full shirt, and logo only shirt.
Capes are beyond me for Sims 4 still, hopefully they will be a possibility later! This download does not include a sim, just the outfit for Teens, Young Adult, Adult, and Elderly Sims. Now you can make the man of steel in your copy of Sims 4!
Clark Kent has just arrived in Sims 4 (or at least his Super-Suit has).
