Granted, it's hard to see this as anything other than a carefully orchestrated PR stunt, as Marvel Studios is a huge conglomerate that likely has to consider all sorts of factors - corporate strategies, stakeholders and all that red tape - before a decision of this magnitude can be made.
Previously tracking for May 4, Marvel Studios' Avengers: Infinity War will now release in U.S. theatres the week of April 27, 2018, according to a revised schedule rolled out by parent company Walt Disney Studios. The exchange also confirms that the pushed up release date is for the whole world, so if you were anxious it might be only in the United States, it isn't.
An unprecedented cinematic journey ten years in the making and spanning the entire Marvel Cinematic Universe, Marvel Studios' Avengers: Infinity War brings to the screen the ultimate, deadliest showdown of all time.
Avengers: Infinity War stars an ensemble cast which includes Robert Downey Jr., Chris Evans, Chris Pratt, Christopher Hemsworth, Scarlett Johansson, Chadwick Boseman, Tom Holland, Mark Ruffalo and various others. Black Panther will be seen in that movie as well and his character's stage has been set with this solo movie and his appearance in Captain America: Civil War. There is also another earlier poster for "Infinity War" that shows Thor with both his eyes.
"Captain Marvel has a very amusing voice, and it's more of an action-comedy, more like what we were talking about doing in the first draft I wrote for Tomb Raider.... She's so sassy, she's such a smartass, she won't take shit from anyone, and the comic books do an awesome job at capturing that voice, and it was important that the entire Captain Marvel creative team [kept to that]".
Black Panther recently enjoyed major success, becoming Marvel's biggest opening weekend ever for a standalone film.
Of course, the MCU isn't actually going to end though.