Okay…. for everyone who didn’t notice the big display at the Archie Comics booth at NYCC which featured all six covers…. (Don’t feel bad… most internet news sites and blogs didn’t notice it either….)
Archie will marry Veronica AND Betty. #600-602 = What If future imaginary story with Veronica #603-605 = What if future imaginary story with Betty
Both stories take place in the future. (This was told to me by a booth employee at NYCC.)
I can't vouch personally for the accuracy of this claim, but it sounds far more likely than Archie and anyone getting married while still in high school.