This week in Firestorm I noticed something....
...the circle on the back of the costume has finally returned!
It used to be there on the classic costume:
Then it left when Jamal Igle redesigned the outfit in Volume 3:
Brightest Day may've seen the return of Ronnie to the Firestorm costume, but the back circle stayed dead:
Even in a reimagined universe there seemed to be no place for it:
Cool.