Ok so if you haven't heard by now, Blizz stated that they'll be releasing a final PvP season to hold people off. Take it how you will but I personally believe that they're falling behind schedule which makes a late Summer release hopeful. The new PvP season is all fine and dandy but I'm curious if they have a back up plan for PvE players as well?
Patch 5.5 would be the hopeful filler with a proper xpac ending raid (i.e. Sunwell-esque) unless they want another DS/ICC to happen which, in my opinion, wouldn't be very good for the community and/or subs.
The only viable end boss that I see at this point would be Wrathion so I ask: if they do implement 5.5, where in the world would the raid take place if not a whole new instance (which I doubt considering the resource requirements) and aside from Wrathion, who could you see as some filler bosses? (Unless they decide to make it a solo boss instance)
Speculate away!
In an attempt to get this thread back on the true topic, I am in no way stating that there will be a raid or large feature in a potential patch 5.5. I simple wanted to welcome speculation as to how they would go about another raid if there just so happened to be one and the content within it. Stop quoting Tom Chilton, we're very much aware of what he said.