So, this guy is looking for news, and just happened to drop lucky on the site right at the right moment, and spot this...?
I'm calling fake. It's just too easy to do, that's a picture I could make in minutes given their past media.
They will likely be saving their images in layers, and as such sure there would be basic text as a placeholder at the bottom, but this suggests that they saved the image to a jpeg and uploaded.... for... what reason? To do what, exactly? This sort of testing is done offline, you don't do it on a public server.
BS. Clear as day, IMO. The plural "series" slogan is used to make people talk. They would more than likely just have "Xbox" on an image like this anyway.
Edit: I also had a quick look at the history of the site on snapshot form, and the site has been updated twice today (1:31am and 5:29am), which is quite common for multiple daily updates it looks like. But both times, this wasn't added at all.
Why do people do this shit?