Just before midday today Brisbane/Sydney/Melbourne time, the first tidbits were coming from SDCC, from their Wednesday night sneak peak before the convention opens up tomorrow.
Some previous years photos were leaked during the set up, but it looks like these were authorised... but so far appears to be exclusive to tfw, as Seibertron is just mirroring the images from tfw, and a regular (BWTF) hasn't posted up anything either.

Since Hasbro never puts out anything new before their reveals panel, all we get to see so far are displays of toys that we already know about or are already out.

(I will have to split this between two posts to be able to include all the links)

First is a display case for the Haslab Victory Saber set.









The Shattered Glass toys - the first wave and three of the second wave, as well as the 2020 GEN Selects 2-pack of Ratchet & Optimus.



The 15th anniversary Studio Series 2007 Autobot movie cast... with a replica Bumblebee Camaro in the exhibit (featuring a Wheelie inside the car).