I just finished watching the season premiere of The Flash. And it was pretty cool. Between the flashbacks, Ronnie's death, and Henry being released - oh, and LEAVING, I was pretty satisfied. If you haven't watched it yet, you should stop reading this (duh) and go watch the dang episode right now.
So, for those of you that have seen it, you should recall the Atom Smasher's death scene. As he is coughing his last breaths out, he says some interesting words.
Barry questioned him on his deathbed, and discovered his motivation.
He promised he'd take me home...
When asked "Who?", he responded:
Now, obviously, this is referring to Hunter Zolomon, a.k.a Professor Zoom. Some of you might not be aware of who Zoom is, so here's a bit of an explanation.
I'm gonna go out on a limb and guess the Atom Smasher we saw was actually from another universe, specifically Jay Garrick's universe. Why do I think this? Well, he said Zoom would take him home. This is obviously revealing he has been displaced from his comfort zone. Maybe Zoom kidnapped him, or he came through the singularity. And apparently Zoom has the ability to travel between timelines and universes.
Still not convinced? This also explains how his counterpart was in Hawaii during the accelerator explosion, and turned up murdered. I am going to go ahead and assume that next week's villain - Sand Demon, or something like that - is also not from the mainstream universe, seeing as Jay Garrick seems to know about him, too.