Hulk star Mark Ruffalo fired over Avengers 4 title leak?

Mark Ruffalo has gone and done it again - play spoiler for MCU (Marvel Cinematic Universe), which he reportedly did in 2017, when he revealed the first 15 minutes of 'Thor: Ragnarok' and the ending of 'Avengers: Infinity War'. But when he attempted to play spoiler again for the upcoming 'Avenger 4' film, he got 'fired'.
It all started when Mark tweeted to Jimmy Fallon to edit the the spoiler slip out from the episode that he shot with the chat show host.He said that whatever he said was meant to be 'off the record'. He wrote, "@JimmyFallon, I trust that you will cut my spoiler slip on the show tonight. That was “off the record” homey. Please don’t get me in trouble with Marvel (Barry) again. DM me back. M"
Jimmy replied two hours later that he was helpless and that the episode has already been sent for airing. "Dude, it’s too late - already sent the final show to Burbank for air. Are you sure you’re gonna be in trouble? We could maybe bleep it out. What is “DM”?", he tweeted back.
It is at this point that the Russo Brothers, directors of 'Avengers: Infinity War' and 'Avengers 4', stepped in and tweeted: "Mark, you're fired."
Needless to add, fans were disappointed to find that Mark did no such thing and that he pulled a fast one on them as he's quite infamous for giving out spoilers.
The release of 'Avengers 4' (A4) is long way off in mid-2019 next year, but it's one installment that's triggered of numerous speculations and theories among fans on social media.