Yahoo has premiered the new trailer for Terminator Salvation, which will be attached to Watchmen this Friday. Check it out below or in HD on YouTube:

/Film explains the plot: In the highly anticipated new installment of “The Terminator” film franchise, set in post-apocalyptic 2018, Christian Bale stars as John Connor, the man fated to lead the human resistance against Skynet and its army of Terminators. But the future Connor was raised to believe in is altered in part by the appearance of Marcus Wright (Sam Worthington), a stranger whose last memory is of being on death row. Connor must decide whether Marcus has been sent from the future, or rescued from the past. As Skynet prepares its final onslaught, Connor and Marcus both embark on an odyssey that takes them into the heart of Skynet’s operations, where they uncover the terrible secret behind the possible annihilation of mankind.

Watch the trailer in High Definition on Yahoo. Terminator Salvation hits theaters on May 21st 2009.

What do you think of the trailer?