
I love that Sierra's Trailer continues the current story, it makes Overwatch FEEL alive
As far as I can recall, hers is the first hero trailer that takes place in the current and active Overwatch story. The closet might be Freja's, with her meeting with Max, but that occurred at more-or-less current day, but not within current and familiar events.
Sierra's trailer, being both current and based on recently familiar events, makes it feel like a living continuation of the world.
WHICH IS AWESOME
Narrative team did an amazing job making her feel like a natural extension of the existing story, and not something tacked on. Watching this trailer makes me feel like I'm reading the next chapter in a manga series, and MAN is it making me happy!