A lot of stuff here, so I think it deserves it's own thread.
Here's a summary for those who would rather read:
-Blizzard announced we would kill Garrosh early on because some fans were displeased with the Pandaren and thought it would be a "funny" expansion.
-The question "Who came first? Titan or Old God" will be answered in the future.
-Blizzard couldn't fit in anything with Sylvanas/Undercity, but canonically the Kor'kron are purged from UC by 5.4.
-The Klaxxi are simply in Orgrimmar hoping Garrosh resurrects their master, Y'shaaraj.
-Dalaran was supposed to be over Orgrimmar during the SoO, but there were too many performance issues, so it was scrapped.
-The Draenei are due for some lore.
-Rexxar was going to be in Battlefield: Barrens, but Blizz ran of time.
My responses to each of those would be
- Hey guys... its a childish expansion. Those corpses hanging from the spires of Orgrimmar in the trailer are just stuffed dummies.. Right guys?... Guys?
-Neither. Its all a trick question! They are both the same age!... at least.. I think so.
-Good. I would have figured Sylvanas wasnt just sitting around brewing up plag-... i uh mean.. Cakes. Yes.. delicious, deadly cakes.
-Makes sense. I had a feeling the Klaxxi had a bigger goal in mind. Why wouldnt you want to let this "pride-poisoned" Orc resurrect your dead Master, THEN betray him. He is doing all the work for them, after all.
-Hmm.... Dalaran as a flying island fortress to rain death and destruction? Well dang. That would have been cool. Bet Thrall regrets letting Jaina not just wash away Org, but doing that would be too easy now. Least this gives us a chance to fix his mistake.
-The inner Draenai in me screams "YAY!"
-So hes just still chilling in outlands or w/e hes been? well crap. when i was questing there, he seems badas*. would have been nice to see him again.