Who was that superhero from Earth X, the one who married Snart? Wasn't his helmet there as well?
The Ray. Yes. But it was probably the Earth-90 doppelganger of the Ray.
Speaking of worldbuilding consistency, they've obviously swept last year's problematical "There are only 53 Earths" assertion under the rug, since clearly there are at least 91 (since Earth-X doesn't have a number). That was a pretty random retcon to begin with, so I'm not surprised they ditched it.
According to
Entertainment Weekly, the tag scene was originally
shot plotted to be one of two cold opens of next week's
Flash episode (i.e. "Elseworlds, Part I"), but they decided it would be less cluttered and a better setup to use it as a tag scene the previous week. Apparently the same scene will be shown at the end of this week's
Arrow and
Flash as well, for the benefit of viewers who don't watch all three shows -- a bit disappointing, since I was hoping each would have a different teaser ending. The article also reveals a bit more about the Monitor's motives.
I think I read somewhere that the episodes this year are somewhat tailored for their specific shows, rather than being one big uniform whole like last year. I'm starting to get the sense that the reality where Barry and Oliver are swapped is going to be mostly in part 1 and extend into part 2, with the Earth-90 Flash scenes largely being in part 1. The publicity photos seem to suggest a second reality with Barry and Ollie as gang members, Cisco as some sort of crime boss, and Merlyn, Diaz, and Joe Wilson as CCPD cops; since those are all
Arrow villains, I'm guessing that reality is featured in part 2, the
Arrow segment (which we know will also feature Batwoman). And presumably the fight against black-costumed Superman (with Earth-38 Superman also participating, judging from the behind-the-scenes photos) will be the climax in part 3, the
Supergirl segment.
Then again, my story-structure predictions last year based on the advance photos for
Crisis on Earth-X proved laughably wrong, so we'll see if I do any better this year.