The last time Edgar Wright and Simon Pegg worked together was The World's End, the final movie in the so-called "Blood and Ice Cream" Cornetto Trilogy (which also includes Shaun of the Dead and Hot Fuzz) from Wright, Pegg, and Nick Frost. But it's not the only time Pegg and Wright have worked together, and it's absolutely not the last.
Speaking to BBC 6 Music, Pegg confirmed that he and Wright are working on a new title that "has a title and everything." Pegg also confirmed that it wouldn't be part of the Cornetto series but added, "we made three films in 10 years and hopefully in the next decade we'll make another three."
No word on when that might happen, however, as both Pegg and Wright have very busy schedules (even sans Ant-Man). In the meantime, you can catch Pegg and Frost reprising their Shaun of the Dead roles for the show Phineas and Ferb: