The purpose of the third Big Top Tent at the newly opened Storybook Circus has so far remained unconfirmed. However can now confirm that this yellow colored tent will be home to the FASTPASS distribution areas for both "Dumbo the Flying Elephant" and "The Barnstormer featuring the Great Goofini". At the moment guests are having to get fastpasses over by Mickey's PhilharMagic, so this will clear that space, allowing it to be used for something else.
In addition to the FASTPASS distribution, the tent will also house a number of food offerings such as beverages, hot dogs, burgers and pretzels. This will work well to compliment the food offerings at the nearby Big Top Souvenirs, which offers baked goods along with other sweet treats.
It's expected that these remaining sections will be opening within the next few weeks, completing Storybook Circus.