Apparently there was a press screening in Brazil for Star Trek Into Darkness. 38 minutes of the film was shown, and a Brazilian site Judao.com (via Trek Movie) put together a detailed list of what they saw, and they contain spoilers. So if you don't want to know anything I wouldn't keep reading. It contains some major plot points in the film, but nothing about the ending.
If you want to check it out... here it is!
"Nibiru mission ends with Kirk rescuing Spock by violating the prime directive by revealing the Enterprise to Nibiru natives so he can beam Spock out of the Volcano
Kirk has a scene in bed (back in San Francisco) in bed with two "cat women"
Kirk makes mention of hoping to get assigned to a "five year mission" (implying that the famed five year mission hasn’t started yet for the time he has been captain)
Kirk is demoted for violating prime directive on Nibiru, loses command of Enterprise with Pike to take over command Kirk as first officer
Pike wanted to send Kirk back to Academy but was convinced (possibly ordered?) to make Kirk first officer of Enterprise by Admiral Marcus (played by Peter Weller)
Spock assigned to another ship
The "father" character uses his Starfleet ring as a bomb (dropping it into water for a reaction) and destroys a facility (in London)
London attack leads to big meeting of Starfleet captains which itself is attacked by John Harrison, resulting in Pike being injured…Harrison transport away
Later scenes in the film….
Enterprise severely damaged falling to Earth with Spock in command ordering evacuation
Kirk and Scott seen in Engineering trying to stabilize ship
Later Spock scene beaming down to San Francisco and starting long chase with Harrions
Eventually Spock meets up with Harrison and engages in a fight"
Whats the one thing that stuck out most for you? I can't get over the Cat Women thing.