How about a Starfinder Revised in August 2020. That will give Paizo time to get Pathfinder 2 out and released on August 2019. Then they can turn their attention to Starfinder and borrow some of the mechanics from Pathfinder 2 and apply them to Starfinder.
I would love to see the new action economy applied to Starfinder. To me there is something about the simple 3 actions per turn that makes the action types in Starfinder seem dated and not as flexible and thus not as much fun.
Also I would like the 'beat the DC by 10' and get a critical success and the opposite '10 or lower than the DC' for a critical fail to be part of Starfinder core.
Now that I am thinking about it, I would like the core rule base in Pathfinder 2 and Starfinder Revised to be as similar as possible so I can borrow materiel from Pathfinder 2 and use it in Starfinder without too much conversion.