It will be INSANE. Please note the use of all caps there. I went week before Xmas last year when most APs were finally blocked and the place was jam packed. 30 mins Little Mermaid around 7pm, 25 mins for Monsters Inc. I waited in the Monsters line, the estimate was accurate. The wait times rivaled Xmas wait times. The parks were so packed on Tues I believe it was, Disney extended all park hours to their latest closing times for the rest of the week.
The crowd dynamics were different. People were almost all newbies so they didn’t have the little stuff down. Like the beignet line at Mint Julep Bar only had a couple people in it.
My suspicion was people finally had the spending money to take their families to Disneyland because we did the same timing the year before and it was a lot quieter!