Well, the pictures of the completely new Toyota have come out from Paul Ricard, and although there's not much to expect in the aero package, there are some new notable differences between the old and new.
The front pushrods have a totally new geometry, with the upper location much higher. In fact, they had to add an ugly bulge in the bodywork to accomodate this.
There is one glaring aero change, with the addition of a second element on the upper airbox, to effectively double what was up there before.