Past profits no, you can't retroactively change an agreement, but going forward is another matter. Just the fact that we can't easily answer this would be enough for most companies not to want to find out.
Only half paying attention to this topic, I've heard that 1.1 would be a modification to the agreement that Pathfinder 1 was made under, I don't know Pathfinder 2 was made under the OGL.
As a few have noted, this is pretty much what happened with the roll out of 4e, which backfired for WotC, I'm guessing they think they have all their ducks in a row this go 'round.
