It is a tribute as to how strong thee Flash rogues gallery is that they can keep dipping into it like this - Doctor Alchemy and Mirror Master.
I have always been a fan of the Mirror Master as a concept but but continually disspointed by the reality, so maybe they can realise the full potential of the idea here. Doctor Alchemy is a character well worth dusting off but is his 'brother' going to be here as well...?
Abra Kadabra. Vandal Savage. Kilg%re. Marzan... is The Turtle verboten?
Does savage exist in this earth, and wouldn't he and ra being natural enemies on each other, as being immortals?