Scott Lang's Ant-Man lends himself to fan theories more than almost any other MCU character. With his ability to shrink down to microscopic sizes and explore the inner workings of universes much smaller than our own, the doors for unsolved Ant-Man mysteries are wide open. It's no wonder fans were able to catch so many Ant-Man Easter eggs, given that the shrinking premise is designed to hide things in plain sight.
As long as the Marvel Cinematic Universe gears keep turning, so will the Ant-Man fan theories. All those unanswered questions from Ant-Man have been thoroughly explored - leading up to conspiracies and suspicions about the plot of Ant-Man and the Wasp.
The ability to enter a realm where space and time become irrelevant leaves holes in more than just math and physics. Fan theories about Ant-Man and the Wasp attempt to fill those holes with explanations, and make sense of a vast and astounding world full of Marvel mysteries.