In most of the MCU films, we get to see credit scenes (from around 1 to 3). But in Avengers: Endgame there was no mid/end credit scene, just a clinking sound. So did they ever said anything officially to address why they avoided an end credits scene? I mean it's not the end of MCU and at-least Spider-Man: Far From Home is coming soon.
Yeah, it was "never in the cards", Endgame being, well, an ending, etc. From an interview with USA Today:
But the newest blockbuster "Avengers: Endgame" – an action-packed, emotionally exhausting three-hour culmination of the 22-film saga so far – breaks from tradition by skipping Marvel's usual stingers, which have at times teased to the next movie in the series or just been a quick gag for a couple of laughs as the audience leaves the theater.
"It was never in the cards," director Joe Russo tells USA TODAY. "It was called 'Endgame' for a reason. This is it. This is the ending. The book is closed on that chapter of the Marvel universe and a new book will get written."
His brother, director Anthony Russo, adds it was a "great thrill" not having to steer the Marvel ship for where it goes next. "This was the first Marvel movie we've done where we weren't thinking about the future."
Sure, it's not the end of the MCU and yes, Far From Home will happen, but the point was never to leave the door ajar.