I’ve been playing through the Borderlands games for the first time lately and really enjoying them. I should be through the Pre-Sequel and 3 by then. Also, there’s probably something we can infer about the GTA 6 release date from this, given the leak that Mafia: The Old Country comes out August 8th.
It’s my thought as well, but Ghost of Yotei was scheduled for October already, and Sony would surely know when GTA comes out, so maybe it’s a November game? Borderlands will likely be enough of a time sink that you might want a few months after it before releasing a GTA.