Paul Rudd visited the Tonight Show on Friday to promote Captain America: Civil War—or at least he was supposed to, but all he could tell host Jimmy Fallon for sure was that Captain America: Civil War kicks off Phase Three of the Marvel Cinematic Universe

Will the movie have the Avengers in it? Sure! Was Rudd able to confirm that we will see Spider-Man in the film too? Maybe. There is, however, one thing that Rudd can tell us for sure: this movie is definitely Phase Three. Ask Rudd what Phase Three is, though, and all he can tell you is that it is Phase Three. 

For Marvel diehards, Phase Three of course is referring to how all the movies in the Marvel Cinematic Universe are split—past, present, and future. Phase One started with Iron Man and ended with the Avengers. Phase Two then began with Iron Man 3 and ended with Avengers: Age of Ultron and Ant-Man last summer. Now, with Captain America: Civil War in theaters next weekend, and upcoming films like Doctor Strange, Guardians of the Galaxy Vol. 2Spider-Man: Homecoming, and Black Panther, the MCU Phase Three begins. 

However, Rudd and Fallon do not know that. They only know the words "Phase Three." Rudd elaborates saying, "If you thought Phase One was good—and it was good—and then you're like, 'What's after Phase One?' Well, Phase Two... Get ready, this is one better than that!" 

Rudd shouldn't worry, though, because by the end of the week, we will all have a better idea of what Phase Three is when Captain America: Civil War comes out on May 6, 2016.