The alien that speak to Optimus in 0:20 of the trailer. Idk if she's the creator or not but she looks kinda familiar These are unused concept art for AOE
This very well could be. Wish we could have seen a closer look at her face tho. As I've pointed out. She could be Quintus Prime (now named Quintessa). The one Prime that was the creator of the Quintessons as well as being one of the first 13.
Instead of having different entities being the Qunints, they've probably just combined them into one, that being Quintessa.
I'm not too surprised that Quintessa has design elements of Widowmaker. The design works pretty well to be a Quintesson character anyway. I'm really digging of what we're seeing of Quintessa so far. She seems to be shaping up to be a pretty powerful villain and the fact that she's the first major no human female villain in the TF movies helps. I'm especially curious to see what's her motivation of wanting Cybertron be born again and if there's a special history between Optimus and her that makes him a large target for her. I also hope we can see other Quintessons that she rules over since she does seem to be the movie verses Alpha Quintesson and Quintis Prime.