From the blog post:
This all surrounds CommuniCore Hall and CommuniCore Plaza, a multi-use facility and outdoor event space, respectively, that bring the park’s international festivals to the center of EPCOT. CommuniCore Plaza will have the flexibility to host intimate musical performances that extend out into the nearby gardens, as you can see in the rendering above, as well as large-scale concerts.
CommuniCore Hall will be a flexible exhibition and gallery space, offering a wide variety of experiences that highlight art, live music, food – complete with a demonstration kitchen – and more. In addition, adjacent to CommuniCore Hall will be a new Mickey & Friends location where you can meet some of your favorite Disney pals.
Read more from Disney Parks Blog.