The Death Star Destroys the Enterprise in San Francisco - Fan Video
It looks like the Empire rebuilt the Death Star again, and they are targeting the U.S.S. Enterprise. The video features the Enterprise flying around San Francisco, and the Empire is taking pop shots at it. Not much damage is done until the Death Star unleashes it's green death ray fury on the ship.
This turned out to be an incredibly cool Star Wars vs. Star Trek fan video. It comes from IGN, and here's a little backstory...
After Star Trek IV, the crew of the Enterprise needed more whales, so they came back to San Francisco again, except this time it's an alternate universe where Reagan's Star Wars defense initiative from the 80's is coming to fruition as the Death Star nears completion (superlaser already fully operational). Star Wars is our military.
I love this, and I'm sure you'll get a kick out of it as well. Check it out!