Marvel’s Avengers is being developed by the Western branch of Square Enix including Crystal Dynamics and Eidos Montreal, which has worked on Tomb Raider and Deus Ex respectively. They have first teased it a couple of years ago but there hasn’t been any update on them since then until recently.
You will be able to watch the reveal for Marvel’s Avengers during Square Enix’s E3 2019 press conference. They will also share new information on Final Fantasy VII Remake at their press conference.
Tune into Square Enix Live E3 2019 for the worldwide reveal of Marvel’s Avengers.
— Marvel's Avengers (@PlayAvengers) May 29, 2019
Marvel’s Avengers still has no official title and they are just showing it with a logo for now. The title should be revealed at the upcoming conference along with other details about the projects. This game is being shown after the first phase of Marvel Cinematic Universe Avengers ended with Avengers Endgame that was released in late April.