Last week Saturday I happened to come across the title for Avengers 4, which I was told was Avengers: Endgame.
Note: This was before the Monday premiere of The Avengers: Infinity War.
I then proceeded to run a poll on our social media questioning if I should release the title (to build up a little hype).
Thursday afternoon I posted the Avengers: Endgame reveal and stated to consider it a rumor at the time.
I can now say with 100% certainty that Avengers: Endgame is the title for Avengers 4 (well, assuming they don't change it now).
I have been provided further information on Avengers: Endgame and the original source of the information.¬†
It is someone who does work for Disney. I know his/her name and job title,¬†and, of course, I shall say no more and won't reveal the person's identity.
Slight spoiler follows for The Avengers: Infinity War.
You will also note that I revealed¬†Avengers: Endgame as the title for Avengers 4 prior to the release of Infinity War, and then during Infinity War, Doctor Strange drops the title while talking to Tony Stark.¬†
The title definitely fits with what is to come, as the sequel is indeed "bigger" and "better," just like the writers said.
I'll also add a little tease in that Marvel's¬†true¬†endgame¬†is what comes next.