Weird...as a fanatical Archie comic reader as a kid, I can tell you all this I remember from back in the day:
-They did a "Who will Archie finally choose?" arc they built up to in the comics for months and it ended up being Archie choosing Veronica as a prom date, losing her and ending up dancing with Betty at the Pop Tate's.
-They did a Betty's Diary thing in the future where at a high school reunion in the future, she was married to Archie who couldn't attend because he had to babysit the kids.
-They did a "15 years later" movie about 20 years ago with Lauren Holly and Christopher Rich where Archie had actually left Riverdale, became a lawyer and was engaged to someone else completely.
They've done all this before, and in typical Archie storyline fashion, it actually wouldn't surprise me that the whole thing ends up being like...Hot Dog's dream sequence.