You could replace the long term damage buff with a Build Up effect and then rebalance the base damage of the attacks around that. All the other melee sets seem to work fine without rage, so could SS.
It would be easier to copy the existing mechanic and balance of it than to code a new variant of it that only lasts for a few shots. Nothing wrong with borrowing against what already works and applying it to a different theme with different effects than what DP has.
DC had 2 Supermen (red and blue one time), multiple Supermen after the "death" of the original, and more recently the original and a Chinese version (also second Batman,Flash,GL, & WW). Marvel currently has 2 Spidermen and has had more (clones, alt reality, etc), and lots of characters have had more than one person usurp their identity. It happens a lot.
Would love to see a world where our AVs are the signature heroes. Maybe use the Recluse Victory map and explain the state of things as things have gone poorly under their watch when the Rikti attacked, especially if our signature heroes were the AVs but were already defeated or just don't exist and there's no Vanguard to unite anyone.
There's some good stuff in Cimerora that would be nice to have added, like the shields on the back as a backpack option, males having lower half of the toga only would fit into the Shorts/Kilts category, and on those back shields there's usually brooches on the straps connected to the shield that would look good as a brooch option for capes. Probably other things too, but those come to mind immediately.
If a wealth power set doesn't use the wealth aura to launch currency at targets and cause them to be stunned, held, or otherwise mezzed then you're not throwing enough money at them because you're too poor to afford the power set.
Make clicking on those access the city map and search features that we can already use just by pressing M or typing /search.
No need to make them do something new, just make them functional at something and move on.