the only other thing i have heard from the horse's mouth, besides what has already been "confirmed"; is a lot of appoligies from Kaz to players with wrecked savefiles.
people talk about the damage model being perfected, more cars converted from standard to premium, new real-world tracks, being able to change the rims on standard cars. but thats all just our WISHES. its what we would love to see fixed.
BTW: what hasnt been confirmed but we can assume is coming in the update, is what needed for the GT academy to continue; a fix to eliminate cornercutting and barrier-riding. it hasnt been mentioned by Kaz or any "official" source but GT Academy was red flagged by it so there will be some kind of fix for it. It may be that i's only for the GT academy. Or it may trickle down into online racing and A/B-Spec. But for certain we can assume a fix will atleast be adressed to GT Academy.