>>102927876Remember, Gunn was working with the Russo's to have the ending of A4 have some set up GotG3.
With a new director for GotG3 coming in likely after Avengers 4 finishes reshoots, the Russos have no one to coordinate with and have to avoid setting up anything as the incoming director would then be hamstrung.
The Guardians will fly off into space and it will be as simple as that, because the incoming director has not decided on anything yet.