Ant-Man and the Wasp has a shocking end credit scene.
In the film's mid-credit scene Ant-Man get trapped in the quantum realm.
His friends, who are waiting to save him, all die at the hands of Thanos.
That ending is a continuation of the ending of Infinity War, which saw heroes fall at Thanos' hand.
Now, according to Uproxx, director Peyton Reed is talking about how that scene related to Infinity War.