Firaxis is still working on V as well as XCOM, so no, I don't think it is officially in development.
If Civ VI ever comes out, then I would think I will be before 2015. This fall patch is probably their last attempt in my mind at restoring the game. Civ V was a huge step from Civ IV, so many things were changed. If Civ VI ever does come out (and it probably will), it will look a lot like Civ V but have all the features, little things, and depth that Civ IV did. Well at least that's my opinion.
Restored? G&K was/is being critically well received. The patch is just expected follow up on the stuff they added and small things they broke and that list isn't nearly as crazy as when Vanilla came out.
If anything most people are expecting a DLC or two and at least one more expansion pack. Before they really need to consider a flashier engine.
What I mean by restored is attempting to make the game acceptable by Civ IV diehards. I'm not saying that Civ V is bad in any way; it just isn't as highly regarded as Civ IV is and is will be their last attempt to fix that.
Not that I have any secret information, but I'd expect that Firaxis has started some preliminary work on a new engine, but not necessarily CVI itself. I doubt they'd use the same one for 3 games. Plus, I'm pretty sure the old engine is partially responsible for the sluggish, unoptimized experience many have with CiV.
This doesn't mean we won't get more CIv5 content while waiting for Civ6.
Did anyone say this wasn't true?
Some never regarded IV as better than III...there will always be people that will not change over for some reason or another.What I mean by restored is attempting to make the game acceptable by Civ IV diehards. I'm not saying that Civ V is bad in any way; it just isn't as highly regarded as Civ IV is and is will be their last attempt to fix that.