This isn't the first time Archie Comics has married Riverdale to the supernatural. The original run of Life With Archie
ran supernatural-themed stories, and there was Archie's Weird Mysteries
a decade ago. Or the recent "Archie meets KISS" storyline, even.
Oh, and "Archie Meets Glee" is basically a Crisis on Infinite Earths
-type story. Archie-Earth and Glee
-Earth are like Earth-1 and Earth-2, the characters swap worlds, and if they can't be separated the multiverse will collapse. Yes, that's even more batshit insane conceptually than the title would suggest.