I don't remember the timeline exactly but I know FFXII happened way before Tactics, I believe that Tactics happens last. I honestly don't want to see a sequel to Tactics, the war ended, they would have to start another war. What I would rather see if a prequel to tactics, and not the 50 year war...although the 50 year war would be a great addition to Tactics, I want to see how the world of Ivalice went from FFXII to Tactics. The catastrophe that happened on that world to take it back to the dark ages, the downfall of Ivalice's golden years.