It's real simple, and it's just one "oh sh*t!" revelation after another.  "Oh sh*t, the Terminator's back!" "Oh sh*t, he's after the kid!" "Oh sh*t, he's the good guy!" "Oh sh*t, that other machine is insanely advanced!" and finally "Oh sh*t, I gotta see this movie."

Maybe it's a thing where they have to prove to everyone their flick is good because the last two were garbage and they wind up overcompensating, maybe it's studio pressure, maybe it's just the fact that the saavy audience already knows so much about it already... I dunno.

We also have to deal with the fact that T1 and T2 are simple premises, while this thing is... wild.  All over the place.  They needed to boil it down.  It sounds more like a crazy man's ramblings, or how I sound when I'm talking about something I'm in the process of making.  A trailer, especially a teaser, should be an invitation.  The "what if."  This isn't that.

I love how "Arnie" keeps calling Emalia Clarke "Jennifer Lawrence Jr"

You were honestly incensed when you thought it was real.  The gloves came off.