I really like the setting. It's way more compelling than the standard future where the concept starts and ends with "superheroes fight".
For this version of the Rainbow Raider, I'm basically artistically constipated. I planned out everything I want to make, but the sentences keep coming out cumbersome and uninteresting.
Essentially, the character was as different from the previous Rainbow Raider as Barry Allen was from Jay Garrick. He was supposed to be a kid who was born blind before being chosen by a clan of leprechauns stationed in Boston. The leprechauns gave him the goggles of Roy G. Bivolo, enhanced with their technoloies to allow him to see different parts of the spectrum at a time (from radiation, to heat, to the same colors we all see), and focusing his input to increase sensitivity in certain ranges. Also, he would be capable of blasting the colors of the Rainbow from his visor.
His mission was to restore the colors to the "Great Rainbow", all seven bands of which were in the possession of the Legion of Doom. In order to acquire them, the Rainbow Raider would raid the lairs of various Legionnaires as a member of the Justice League.
I love the concept, of course I'm biased. But my sheets keep coming out awful.