From the blog post:
With the “Guardians of the Galaxy”-inspired coaster, we’re going big. This one-of-a-kind family attraction will be one of the world’s longest enclosed roller coasters when it’s added to Future World at Epcot. It’ll feature a unique story currently being created by Walt Disney Imagineering and include a new innovative ride system that’s guaranteed to “wow” guests.
Read more from Disney Parks Blog.