It's gonna suck because it's a given that anything coming out of Hollywood right now is going to be mindless ****ing trash.
I'm sure they'll make some vague attempt to pay homage to the first two movies, and tie in just enough to the third movie to keep the studio happy. Just as I'm sure they'll completely ignore all the concepts of the expression of free will through pre-determinism which made the first two movies so awesome, and whose absence caused the third movie to suck so ****ing hard.
The gist of the movie is that Connor's not yet the leader of TechCom (which is now just the 'Resistance'), everyone's wary as **** because he knows so much **** about SkyNet, and the T-800s are about to come online for the first time.
Frankly, there are only two ways this movie could not suck.
First, is if they just cram pre-determinism down everyone's throats. Have Connor winning leadership of the Resistance by virtue of making seemingly insane, suicidal acts of astonishing 'courage' because he already knows he lives to see SkyNet's defeat.
Second, is if Marcus (some mook who just shows up) had turned out to have been ****ing around with time travel sometime in like 2080, and then all of a sudden he's back in 2018 in a post-apocalyptic wasteland caused by a war that as far as he's concerned should never have happened. Because that'd just be hilarious. However, I already know this not to be the case.
And then there's the small matter of McG directing. This man made Charlie's Angels and was an Executive Producer on The OC.
They're making a film about humanity's fight for survival against evil robots in a nuclear wasteland, and they handed over the artistic reigns to a man whose biggest career accomplishment before Charlie's Angels was directing ****ing Offspring music videos. A man of such legendary insight and unparalleled knowledge of cinema that he studied psychology at university.
Oh and did I mention that mankind's brutal struggle to regain their freedom from oppression, slavery and brutal death at the hands of the tyrannical SkyNet is going to be rated PG-13?!
Which basically means no humans are gonna die on-screen, and you might get to see John Connor kissing his pregnant wife - but he won't be slipping her the tongue.
IT'S. GOING. TO. SUCK. BALLS.