Maybe I'm just getting jaded in my "old age," but I don't give it more than a year. Figure that you only make changes like this to bring in new fans, but unless you sell comics where kids can find them, you're not getting new fans, and old fans...well, Betty and Veronica aren't necessarily recognizable to the public, but the names alone are iconic enough that people know they're supposed to know them and they're pretty sure you're talking about a love triangle.
I feel like, for all creators talk about reinventing characters and "bringing them back to their roots," they don't spend a heck of a lot of time thinking about what the core of the characters really are...