Like in the original Iron Man, Tony Stark's sidekick was teased but never got in the suit until the second film. Sure, Terrence Howard was replaced by Don Cheadle, so he didn't technically get into the suit for Iron Man 2, but a similar kind of tease was used in the making of Ant-Man.
Evangeline Lilly, who played Hope Van Dyne in the first film, knew if there was ever to be a sequel, she would wear the suit, but what she didn't expect was a shared bill. Instead of joining as a sidekick for Ant-Man 2, the movie is billed as Ant-Man and the Wasp, and most of the plot focuses on really showcasing the duo as equal partners.
"At this point, my understanding is that we need to get butts in the theater seats again if we're going to have another film," Lilly said of a potential third film in an Ant-Man and the Wasp trilogy. "So if everyone gets out and watches it then I would assume we'll have another one. I hope we'll have another one, because I really want to do it again, but I don't know right now."
The first Ant-Man film went on to gross over $500 million worldwide, which might not be as high as Infinity War's $2 billion, but pretty significant for a stand-alone, superhero film about a man and his ants. Following Infinity War, Ant-Man and the Wasp is projected to out-perform the first film, due out in theaters this Friday, July 6th, 2018.