Marvel Studios, from the statements of director James Gunn, has just confirmed that the official title of 'Guardians of the Galaxy 3' will be 'Guardians of the Galaxy Vol. 3' as we all expected. There was still a certain hum with the fact that it could be called 'Guardians of the MP3 Galaxy' in relation to the music that is related to this cosmic franchise of the Marvel Cinematic Universe (MCU) and that James Gunn himself has denied in the following way :
So, this is the official title:
'Guardians of the Galaxy 3' will debut in 2020
Although it has not yet been officially confirmed, the premiere of 'Guardians of the Galaxy 3' will take place in 2020; probably in may. Although what happened in 'Avengers: Infinity War' has left the franchise literally diminished, 'Avengers 4' will expand our knowledge about the status quo in which all these cosmic characters will be before facing the end of a trilogy that began in 2014, which expanded in 2017, which faced the impossible in 'Avengers: Infinity War' in 2018 and which will close the story of Star-Lord (Chris Pratt), Gamora (Zoe Saldana), Drax (Dave Bautista), Rocket (Bradley Cooper), Groot (Vin Diesel), Mantis (Pom Klementieff) and Nebula (Karen Gillan).
We know practically nothing about the possible synopsis, plot or story that this third and final film of these Guardians would have. We say "last" and "these Guardians" because James Gunn explained after the premiere of the sequel that the third would be his last film with these characters and that would close the story of all of them. He also assured that Gamora would be the main protagonist of the film, although right now we do not know if it was a joke after what happened in 'Avengers: Infinity War'.