It's never going to happen and even if it did it'd be plagued with issues on top of being dead on arrival but
I love GW2's WvW mode, it's a lot of fun and it'd be cool to see the devs experiment with something like it

When they mentioned adding secure back I knew it would be have the same issues it had before
Dark Knights leaping to their death or monks camping
At least now you can knockback resist

Having varied modes in general would be fun, I'd like them to expand the daily to cover all sorts of PvP rather than just frontline
Though frontline gives a lot of experience so it'd probably need to be split up into the different modes
So a daily PvP tab for frontline, rival wings, etc