I just happened to catch that ad also. It's the first I knew there was a sequel on the way.
As it was playing, I figured out what it was when many of the actors from ID4 appeared one by one.
The ad hit me as ID4 on steriods. Too much steroids. Over the top, in yo' face, trying way too hard, and throwing way too much at the viewer in that Transformers franchise kind of way.
But I'll probably give it a shot in the theater anyway... unless some of you confirm my suspicions and tell me to stay away.
Yeah, I can be curmudgeonly at times. Get off my lawn with those movies that make my head hurt.
One more thing; those shots at 2:20ff of soldiers firing at the overwhelming numbers of bad guys with futuristic rifles reminded me of similar scenes in Starship Troopers. I know it made for exciting and compelling viewing for some, but I always wondered why they didn't just nuke those bugs from orbit.
Speaking of nuking from orbit, if the bad guys in ID4 came back, they wouldn't waste their time duking it out with earthlings by going face to face with us in their "fighters," would they? They'd just nuke us from orbit.
Maybe I'm overthinking it. Maybe it's just supposed to be escapist entertainment. Heh heh.