ACTUALLY... there is a direct bus from Blizzard Beach to both the Disney-MGM Studios and Epcot.
The Studios route is Studios -> Blizzard, picking up for AKL -> AKL -> Blizzard picking up for Studios -> Studios... runs until park clear.
The Epcot route is Epcot -> Coronado Springs -> Blizzard, picking up for Epcot -> Epcot.... runs until 9pm daily.