Why? He didn't say what the twist was, it may not be what you think at all.
See? That's what I was thinking.
I don't get the complete hatred some people have for the groupthink found on other boards - yes, even TWOP. The prevailing Lana-hate may irk the Sweeters, and the Chloe-will-become-Lois forecasting gets olds, but there ARE very educated opinions about the show and its characters to be found on ALL boards. I've read some pretty insightful posts at TWOP. I've also read some really deep stuff at Sweet and K-Site too. If you follow a board long enough, you learn what to expect from the regs, so you either skip over those people's posts or you seek them out.
Back to Craig's spoiler - he said the twist was something that excited him. I'm not sure Bizarro expressing feelings for Chloe would excite Craig. Plus it's OOC for Bizarro. He'd go after Lois if that were the case. That said, I do think Bizarro is involved in some way, and I have a feeling there will be a lot of misdirection. Furthermore, since Craig said he wasn't allowed to reveal the twist, my guess is that it's bigger than one character being mislead. If Bizarro is involved, I think the twist would be something like him impersonating Clark - and both the audience and the other characters are not in on that knowledge till the end of the episode.
There's other possibilities too. Craig said some people would be unhappy with the specific twist, but he didn't indicate on what grounds. Take Reckoning, for example. The twist was everything getting "undone" by the second half of the episode, but not everybody liked that. So I wonder if Gemini will be an episode in the vein of Reckoning, where they pull a Groundhog Day like twist on Clark and Jor-El shows him various outcomes of an event with and w/o Clark's presence? The bomb in the elevator and Lois holding a gun on Lex amps up the need for Clark in a who-do-you-save-first kind of way. There could be a lesson learned there.
I don't think the 'ships play into Craig's excitement since he's never come off (to me) as being
that affected by it. Plus he's already said he thinks the Clark/Lana 'ship will continue, so for the fans of that 'ship, I really don't think this twist has much to do with Clark and Lana per se.
I know Craig likes Chloe, so maybe the twist involves her in some way - maybe her Krypto power. TWOPers aren't big on the "tears of suck," so perhaps that gets undone in Gemini and that's what would make them happy? I dunno. There's a lot of things that might make Craig *and* the TWOPers happy w/o necessarily being to the detriment of other fan's opinions.