Argh! The JSA has been reborn, hurled back and to the left into the warm embrace of a reconstituted Earth-2. This is both a Good Thing and a Bad Thing.
It's Good because it keeps the legacy characters that make up the Justice Society of America around. I like the JSA and what it became over the past generation or so - Golden Age characters who inspired the heroes of today and train the heroes of tomorrow.
It's Bad because they are rebuilding Earth-2 to fit the JSA in. This is fire DC is playing with. I don't need to get into how the whole 'multiple alternate Earths' thing is pretty confusing for new readers. My wife once took a look at the cover to an Infinite Crisis book, saw that there were two Supermen, and asked which one the clone was. To have her be even vaguely interested in superhero comics is astounding - that vague interest faded away the moment I mentioned alternate Earths.
Now, I have nothing against What If and alternate Earth stories myself. I think that Superman: Red Son is one of the best Superman comics of the past umpteen years. But Red Son was a closed system. Just like The Nail or Secret Identity, it worked best as an Elseworld story. It would not do to have Soviet Superman popping up in our mainstream continuity. Thing is, I know that it will not be long before Earth-2 JSA folks crossover into Earth-1. Why?
I am both surprised and not at all surprised about Power Girl's popularity. Looking at the searches that bring people to this blog reveals a whole lot of interest in Power Girl, interest that the Powers That DC-B cannot ignore. If she exists with her JSA pals on Earth-2, fan interest will bring her over to Earth-1 pretty quickly. It will not be long before we end up with Power Girl as continuity-adrift refugee from between worlds again. Which means there will be a longing to get her home, soon followed by a crossover, and then likely by some sort of Crisis that will bring the rest of the JSA folks over to the main continuity.
It'll happen, it's inevitable.
I mean, it's comics after all.