I've always thought there should be a shit ton of gated content 🙂 AT specific, origin specific, team size specific...the list goes on. But again, that's just me.
Also, how about origin specific power pools, that you unlock by doing the origin arcs? There are already Willpower (natural), and Sorcery (magic), and isn't Utility Belt (tech) in the works?
This might be pushing it a bit, but since the AT's have inherents, why not origins as well? Small buffs/debuffs, that 1) only come into play against similar origin villain groups, and 2) are stackable, so that teaming with similar origin characters is like the Leadership pool? It always feels a little weird that my natural scrapper is teaming up with someone who glows purple and shoots rays out of their eyes 🙂 "Calling all magic heroes, team forming to stomp on Circle of Thorns".
Edited to add-The origin buff/debuff would also aid in the whole "getting your ass kicked by Vahz at level 2" problem 🙂