I've heard of that theory as well, but even so,
! I agree with Nectar that if that does happen, would rather it just be a brief thing. I think Hank and Dean are better as heroes, but especially Hank, who actively wants to be one, so him turning to villainy…eh. Especially since then that would also put him at odds with Brock, the person he looks up to most in the world.
! Not a fan of the twist, although the minute Hank said he couldn't get in touch with Sirena at the beginning of the ep, I had a sinking feeling that that's where things were going, and him insisting on going out into the blizzard to find her pretty much sealed it. It's a bummer, too, because I really liked Sirena, but her cheating on her boyfriend with his twin brother definitely makes me feel way more "ehhhh" about her, haha. Yeah, Hank sending her that many messages was smothering and overbearing, but didn't mean he deserved that. There's clearly gonna be quite a bit of conflict between Hank and Dean, but really don't want it to spiral into some kind of "brother arching brother" thing.
! Still got several open plot threads right now–in particular, this new sibling triangle development, plus the teleporters that Monarch and Gary stole a couple eps ago, plus the whole thing about Dr. Venture and the Monarch very likely being half-siblings (which this episode alluded to with the time machine thing)--so I'm curious to see which one(s) the finale ends up focusing on.