Is this true about Terminator 5?

I've just read a spoiler on a website that claims that John Conner will travel in time back to the year 2011 and the story will be set in London when the war just started. He is back in the past to Prevent a sky net attack that could affect his own future. Is it true or false? I always thought the 5th one would be about Kyle Reese being sent to the past to protect Sarah Conner.