So, a bit of a spoiler alert here! But not too much -- just the fact that, unfortunately, there will not be a usual post-credits scene after "Avengers: Endgame" as Marvel fans have come to expect. Naturally, it makes a lot of sense, since the movie is the *finale* after all. But don't fret, Marvel still has placed SOMETHING at the end.
While "Endgame" doesn't give anything away for phase 4 just yet, there is an audio teaser after the credits conclude. The audio, which plays over an image of the Marvel logo, is described as a "clanking," potential metal on metal noise, as well as hypothesized as "someone banging on something" by the outlet.
Fair enough! We can't wait to see it!