The Sentinel logo received eleven slices from the light arcs in the reveal trailer. I've seen a lot of people speculate that this is intended as a hint of when another announcement is. A lot of people are guessing it is supposed to hint at 11/11/27 for another announcement, as the light slices hit their peak when there is 27 seconds left int he video

While I wouldn't personally jump fully onboard with this, this would not be the first secret message hidden in Bethesda marketing materials if it turns out to be true.