As expected, the first trailer for Avengers: Endgame leaves us with many more questions than answers – like, “who’s going to rescue Tony Stark from a depressing death in space?” and “how did Ant-Man escape the Quantum Realm” considering that Hope, Hank, and Janet all disintegrated at the end of Ant-Man and the Wasp?
Source: IGN.com Is Shuri Dead or Alive in Avengers: Endgame?