Hey there, Jodi, and welcome to planDisney!
It sounds like you're planning to take the Disney Parks by storm this September. Three days of non-stop action at The Most Magical Place on Earth with
Avatar Flight of Passage,
Guardians of the Galaxy: Cosmic Rewind, and
Fantasmic! on the same day sounds like a monster of a challenge. If you're planning to utilize
Lightning Lane Premier Pass at one of the parks on this super-packed day, I'd recommend choosing it for
Disney's Hollywood Studios.
Of the three parks you're planning to tackle on the 25th, Hollywood Studios has lots of attractions that tend to have higher wait times. Using your Premier Pass will let you hit Slinky Dog Dash, Star Wars: Rise of the Resistance, Rock 'n' Roller Coaster Starring the Muppets, and so many more.
Pro-tip: You can still snag
Lightning Lane Multi Pass and
Lightning Lane Single Passes for other parks for your 3-park, 1-day party if you'd like. However, if the main goals for Animal Kingdom and EPCOT are Avatar Flight of Passage and Guardians, I would actually recommend just rope dropping Animal Kingdom for Flight and purchasing that single pass for Guardians.
Jodi, have the most magical time on your adventure. Stay hydrated, grab lots of air conditioning when you can, and remember, if you have any other questions, please
come back for another chat.
Happy planning!
Taylor