What is the expectation for EMH in December. We went over Christmas in 2016 and MK has EMH basically everyday. Is it likely the daily HS EMH in September and October will be extended through the end of the year?
Almost certainly. Maybe not for 3 hours every day though, although it might be.
There is a theory they stopped on the 2nd Nov because marathon day is the 3rd, and the route runs through DHS - or has done in the past.
Plus the actual Christmas week, there will definitely be the usual 7am EMH every day at MK, and likely the usual ones elsewhere.
Do you think all of the EMH will be extended, or only HS?
It depends on the opening of Rise of the Resistance.
Everything so far is pointing to this opening in November / December. If that happens, then they may well repeat what they’re doing in September /October, to draw people away from DHS.
Which would mean no EMM at MK 
I haven’t seen any EMM dates announced after Aug 27th for the rest of 2019. I’m hoping Fall dates return in 2020. I like to go to WDW when all the kids are in school and the weather is cooler. =)