Some other world-building details I think would work well here:
Super-heroing has become much more standardized, with various superhero academies. At these superhero academies many people go through a modified version of Terrigenesis, wherein they are first genetically altered into an inhuman (if not already) and then go through Terrigenesis to get powers. These powers are generally mediocre, and head off the development of many of the fairly common avenues to getting more powerful powers (mutant powers, lab accident powers etc.), which has the side effect of ensuring that nobody develops a power that can really rock the boat.
The world has been advanced to near-post-scarcity levels by a network of fully-automated Stark Technology factories and hydroponic farms, along with a delivery system, enabling a level of "luxury communism," especially in the first world. However, Tony Stark died over a decade ago, and there are few people who can even properly maintain lower-grade Stark Tech, so this network is gradually falling into disrepair. Working Stark Tech is enough to make someone a "super" all on their own, and many tech type superheroes and supervillains are either people Tony gave access to Stark Tech or people who were able to understand low or mid-level Stark Tech enough to repurpose it. High-End Stark Tech (along the lines of the Bleeding Edge Armor) are nigh-mythical.