Seems too early for Last Titan material. While Blizzcon has occurred before the final patch launched - I'm virtually positive Shadowlands was announced before the N'Zoth raid for Battle For Azeroth was actually released - that we haven't even heard about 12.1.5 or 12.1.7 material, much less 12.2, makes me think the big push will be Alt-Classic (or whatever its called).
It'll be interesting, between Last Titan and beyond, and Alt-Classic, which Blizzard markets as 'The Usual', and which as 'The Radical Departure'. There's already a lot of chatter that if The Last Titan wraps up the Titan storyline, 14.0 and beyond would be a radical reinvention of what the WoW world is - but isn't that the ad campaign for Alt-Classic?