I will expand on this as able due to Hotel Wifi but the Alien: Romulus panel was amazing. New footage and the cast were amazing on their own. But we had a Facehugger attack and Chestburster on stage as well as awesome swag.
Footage shown was in-line with what we saw at SDCC such as the water tank and Face Huggers and the Birth Scene. Fede said trailers to date and footage have been edited to not give much away even when they appear to. I can say they looked different than what we saw at CinemaCon as they were more concise with some new added and other elements dropped.
The new scene where a cast member finds a skin and what I will call a nest was great. The recent trailer shows part of this but seeing the scene where he electrocutes it only to learn not to poke the bear and the aftermath is great. Enjoy the images.