Not only are some friends and allies like Harry Wells and Jesse Quick presumably gone for good, but the latest episode’s version of Mirror Master proved some previous villains are returning as new incarnations.
The Flash returned to the airwaves in 2020 as the most senior series in the Arrow-verse, and the “Crisis on Infinite Earths” crossover changed the Scarlet Speedster’s status quo in some big ways.
Now it looks like another villain was changed by the “Crisis” crossover: Gorilla Grodd.