Too soon? Well, the teams are already working on them, so why not. By the look of it, Ferrari and Merc might end up going with full RB type sidepods. RB20 will probably be indistinguishable from the RB19. I suspect all teams will have implemented RB anti-dive front suspension geometry.
The most interesting development might be to see how many opt for pullrod front and pushrod rear. This will be somewhat dependent upon if Merc and Ferrari go in that direction.