Oooh, I like the sound of that!
Maybe even take a page from the Mexico pavilion at Epcot -- have the Classic Monsters land (actual name TBD) housed inside a massive showbuilding. Inside, it's perpetually night, with several areas serving as the gateways to multiple attractions: a replica of the European streets sets from the Universal backlot that stood in for so many villages in the monster movies...
... perhaps the fog-shrouded forest from THE WOLF MAN...
... and maybe even the iconic, grand entry hall of Dracula's castle...
And I'd unabashedly rip-off Hogwarts and put the whole pavilion inside a forced perspective version of this: