[HWR_14]

You already paid for it. Might as well try and watch it.

Trailers seem to have only a loose connection to the movie itself. They're made by different teams, sometimes with different (unused) footage.

[mikestew]

Your point is well taken, but the trailer would have to be pretty disconnected from the actual movie for it to be worth the time, IMO. :-)

[HWR_14]

You could also check out reviews. But I think I recall Ragnorak having a very disconnected trailer from the actual movie. Like the MCU uses the same trailer people for each one and they never got that the Thor storyline was supposed to be funny.