I would pillage DRACULA'S DAUGHTER and create this new ending:
Original footage until Dracula's final kidnapping of Mina.
Dissolve from Dracula reaching down for Mina to stock footage of airplane from DRACULA'S DAUGHTER.  Dissolve to the title card TRANSYLVANIA and Transylvanian wedding sequence from DRACULA'S DAUGHTER.
After the peasant's see the light in the castle and flee inside the Inn, cut to Dracula and Mina on the Carfax Abbey staircase (now Castle Dracula) followed by Renfield's "Master I'm here!" and play from there to the end. (The Carfax Abbey grotto is indistinguishable from the Castle Dracula grotto anyway.)
Not perfect (Castle Dracula model in DD doesn't match 31 model) but creates the illusion of the "dash back to Transylavania."
Eh. "It was my idea but I don't think much of it."

Last Edited By: Allen Champion Feb 26 15 5:06 AM. Edited 2 times.