Only if you have a park reservation at Epcot, or hopping capability past 2 pm. To hop after 2, you must hold a reservation to another park and have already entered that park.
So if you're just going to pass through Epcot from BC on the way to MK, there's only two possible scenarios:
1) You have an Epcot park reservation, hopping capability and it's after 2 pm;
2) You have hopping capability, you've already been to a park, returned to BC and intend to go to MK after 2 pm.