We know that the Quantum Realm will play a big part in Avengers: Endgame, so could Fury have used a Quantum pager to contact Danvers?
The Captain Marvel Prelude comic revealed that Nick Fury liked to think of Carol Danvers as his silver bullet, or last resort.
If this Quantum pager theory proves to be true, we could see Captain Marvel and Ant-Man sharing some intel about traveling through the Quantum Realm and utilizing time vortexes.
Captain Marvel hits theaters before Avengers: Endgame, so we should have a better idea of how Carol Danvers will be involved in possibly reversing the effects of the Mad Titan’s ultimate goal.