Just wondering if this is possible in terms of timing to go to EMH rope drop at MK, ride one ride, maybe two, and then hop on over to DHS for the 9AM rope drop?
I don't think you'd make it in time purely because of all the transportation time involved and also bag check. There are not really any rides near the entrance of MK and then exiting you'd be a fish swimming upstream as the park filled up.
If it the EMH rope drop was at 7 am, then you could definitely make it. But if it was an 8 am opening, you probably couldn't make it before 9. The transportation time ver there is definitely the issue. You never know how long you will be waiting for the bus and then how long it will take to get there depending on WDW traffic and if you are in a line of busses before it actually stops. I have waited on the bus for 30-45 min before just to get from MK to HS. You're not missing much though if you don't go to MK EMH. It is still pretty busy compared to other park's EMH.