Disneyland park has announced the return of its Hyperspace Mountain Overlay among other special Star Wars entertainment to kick-off on Star Wars Day (May 4th) 2018:

Quote Originally Posted by Disney Parks & resorts

... beginning May 4, all Disneyland park guests will be able to enjoy these new and returning Star Wars experiences:

--“March of First Order” – Captain Phasma guides a squad of First Order stormtroopers through Tomorrowland in a dramatic show of force.
--Encounter Rey – Meet the Resistance’s newest hero at Star Wars Launch Bay.
--Hyperspace Mountain – This popular transformation of Space Mountain returns!