According to the Disney site, Epcot closing on Sunday November 9 has been moved to 10 PM.
I am guessing that is in reaction to the fact that they have to close at 9 on Saturday Nov. 8 due to the Wine and Dine Half Marathon, not that they are expecting large extra crowds that day.
Last year, Monday was a holiday, and this year Tuesday is a holiday. So I don't know what effect that will have on the Sunday night crowds. There'll be an influx of those who came for the marathon and aren't leaving until later in the week but you may not have as many locals who have to be at work or school on Monday.