How about a PVP match like frontlines but based on a housing ward map? That would be fun, repelling hoards of PvE enemies in a 24 or 72 man coop... sorta defending the fort.

That would be a interesting 10 minute adventure. The PvP arena map could be based on an existing ward from any server in the datacenter (so you may recognize your neighbourhood), you would not be able to go inside the houses themselves, and it would be instanced so you don't annoy the real residents of that area. But you could see how people decorated their houses and frontyards while fighting sahagins, or goblins or ixals or whatever invading force was trying to break through.

You get ranked by kills/heals/damage dealt, and the goal is keeping the invading army from securing certain locations in the ward... I'd play that!