According to the articles I've read, there is going to be several comics in a story arc with twists in the plot. The second one is supposed to show Veronica and Archie at the alter. The story is supposed to end back in the "real" time with them in high school again. This could end up being one of those stories where the characters were actually dreaming or something.
BTW, Archie would be a total idiot for not choosing Betty!