Let me see if I can unpack the concept. Stripped of superfluous words, the concept seems to boil down to:
After gaining superpowers, a group of clumsy young adults set out to become supervillians by seizing control of the city from the corrupt superheroes who protect it. (27 words)
I see 2 major problems with this logline (and the original). First of all, how can the young adults become the world's "first supervillians" when in the universe of the story the putative "superheroes" are corrupt-- in effect, they are already supervillains?
Well, the ready explanation seems to be that that is the end of Act 2 Big Reveal; the main characters discover that the superheroes are corrupt, are actually the world's first supervillains that the main characters aspire to be.
But a logline shouldn't give away the Big Reveal. And since the story is, I presume, told (primarily)from the POV of the wannabe supervillains, it's sufficient to frame the logline likewise. The objective goal of young adults is to be supervillains by overthrowing the superheroes.
The other problem I see is that the logline requires an ensemble cast of two sets of superstars-- supervillains and superheroes. That makes the script harder to sell because it raises production costs; the story requires multiple major roles.
And it makes it harder to sell the script because it offends egos; major talent does not like to share top billing; they are not motivated to attach themselves to a script where they are only one among several equals.
But aren't there ensemble casts featuring major talent for a lot of super hero movies? Yes, and as far as I know, all of them come pre-tested, pre-sold in the graphic novel market. Has your collection of wannabe supervillains and putative superheroes been tested and proven to be money making winners in the market of graphic novels?
IMHO, it would be better marketing to pare the concept down to one wannabe super villain against one putative super hero. So here's my repacking of the concept:
After gaining superpowers, a klutzy young man (or woman) sets out to become a supervillain by overthrowing the super hero who protects the city. (24 words)
fwiw