Is there going to be another gears of war

No. Gears of war 3 is the last one (wrong)

As of yesterday, this is no longer true. Game informer has released a picture of Gears of war 4, although the actual name of the next gears of war will be announced on the 4th June 2012. In the background of the pictures, reavers fly, so I think it is going to be a prequel unless the locust come from outer space. After all, in gears 2, Benjamin Carmine does ask "So were they just...here?" It also shows two onyx guards taking a prisoner (most probably Marcus) somewhere. This adds to the idea that it is a prequel, as in Gears of War, Marcus was in a prison after disobeying orders to save Adam Fenix. Dom then broke him out after the prison (called the Slab) was overrun with locust.
I have also heard that it is nothing to do with Marcus though. What's happening?

let me know what you think. This is the web adress:
http://www.gameinformer.com/b/news/archive/2012/05/31/our-august-cover-story-is-the-next-gears-of-war.aspx