Since we are not getting more five man dungeons this expansion, blizzard could do the same thing to them as they have done to scenarios.
That way they don't have to spend developing time making new ones.
They could call them elite dungeons or something.
They should require a premade group, just like the heroic scenarios, and award 516 gear and valor points. They could also have optional objectives for bonus valor. The awards from the current five mans, are just to bad compared to raid finder and scenarios. Five mans are my favorite type of casual end game content, and i wish they were a viable option to raid finder.