Hey, Paula! I am so glad you are planning ahead for your
FastPass+ selections! There are some pretty great ones out there and in my experience, some of the bigger attractions can see their availability dwindle as soon as their booking window opens (I am looking at you, Avatar Flight of Passage and Slinky Dog Dash!). Guest can begin making their selections 30 days in advance of each day they plan to visit a theme park. As a HUGE
benefit to guests staying at a Disney Resort Hotel, those FastPass+ selections can be made up to 60 days in advance of check-in day! That expanded booking window can take your Disney day from practically perfect in every way to supercalifragilisticexpialidocious!
The two theme parks you mentioned do have a FastPass+ tier system in place. You will be able to make one selection from Tier One and two selections from Tier Two. The options available in each tier are subject to change at any time, but here is what you can expect to find for your trip later this year:
Disney's Hollywood Studios
Tier 1: Slinky Dog Dash, Toy Story Mania!, Alien Swirling Saucers, Rock ‘n’ Roller Coaster Starring Aerosmith, The Twilight Zone Tower of Terror
Tier 2: Voyage of the Little Mermaid, Disney Junior Dance Party!, For the First Time in Forever: A Frozen Sing-Along Celebration, Indiana Jones Epic Stunt Spectacular, Muppet*Vision 3D, Beauty and the Beast - Live on Stage, Star Tours - The Adventures Continue, Fantasmic!
Epcot
Tier 1: Frozen Ever After, Epcot Forever, Soarin', Test Track, Meet Disney Pals at the Epcot Character Spot
Tier 2: Disney & Pixar Short Film Festival, Journey Into Imagination With Figment, Living with the Land, Mission: SPACE, The Seas with Nemo & Friends, Spaceship Earth, Turtle Talk With Crush
I hope this information helps you FastPass+ your way to a magical Disney day!
Brandy