Not sure if I am allowed to post a link to another Disney related forum web site, but over there, (while acknowledging its rumor status), they say multiple sources (not cited) are stating that Disney will officially announce this week that they are bringing Cars Land to DHS. LMA and the BackLot Tour would be removed to allow an expansion of Pixar Place to include the new land.
I know this has been mentioned before as a rumor. I also saw on the home page of MC that the big announcement of "What's Next" was cancelled (renamed) on 12/7.
I guess we will learn more soon. Personally, I would love something unique and from a different franchise (SW!) or another element of Pixar.