It was confusing for us this AM as well. We opted to take the resort Monorail and were told it won’t stop at MK before 8:30(the quote was “even if it’s 8:29 it’ll go right by”.) The resort Monorail is running from 7am for breakfast reservations. So we hopped on the resort Monorail shortly after 8am, got off at the Contemporary, and walked the walkway up to MK. We were entering the gates at 8:30 (which is when select rides start operating for a 9am open). The “rope drop” is not happening currently, as they are letting guests in the park early and attractions won’t operate until opening. Not sure if this is a distancing effort or what, I’m a fan actually. I was able to complete 7DMT x2, Space Mountain x 2, Buzz x2, and carousel of progress by 9:30am, essentially walk on each time.
It was a bit of a process to Monorail to Contemporary then walk, but it was effective. And you could give yourself plenty of time. I haven’t tried the TTC option so I can’t compare but a lot of what I read is it starts at 8:15