1) Kid Flash
The trailer’s final big reveal is to give us our first look at Wally West in action as Kid Flash. A couple of weeks ago a few promo images of Wally in costume were released, but here we get to briefly see him square up against a villain and another Flash.
Yes, an intriguing factor of the trailer that it is easy to miss is that Barry appears in his Flash suit on a few occasions. This suggests that Barry will still have his powers, meaning that he was also hit by the particle accelerator in the Flashpoint timeline.
This is different from the original comic, where Barry has to get help from Thomas Wayne to electrify himself with lightning in order to regain his powers. Something similar was done last season, however, so perhaps they did not want to repeat themselves here.