From left to right:
Probably Baraka, but hoping for Noob. No offense to Baraka fans, but I think the ninja would have more interesting variations.
Probably Sindel or Frost. The hair seems deliberately obfuscated, and they have distinctive enough hairstyles to want them obfuscated. That said, it's ambiguous enough that I'm hoping for Mavado. Yeah, he's dead in the comics, but versus mode isn't in line with the story anyway.
Almost certainly a cyborg. Yeah, versus mode isn't in line with the story, but I suspect that since Sektor is dead it'll be Cyrax, with variations to cover the others.
Definitely looks like Bo' Rai Cho. I want to say it's Rain, with shadows and a cape masking him, but that's a stretch.
It seems like Rain isn't happening. I thought he was a shoo-in, but I have a theory:
Maybe one of the cyborg variations is a "Rain" variation?
Unlikely, but Hydro's been requested here and there for a while. Maybe Rain was a challenge to work variations around, so they gussied up his movelist, made him a variation for the cyborg and called it Hydro? That could maybe cover more ground with the other characters, since then there'd at least be a Rain?
Can't wait for this to be debunked in a matter of hours