Translation: A bunch of guys were standing at some studio office talking about how hot Rosie Huntington-Whiteley looked in DOTM, which likely led to them talking about how her boyfriend Jason Statham would be perfect for a role in the next movie but he only likes dark stories with flawed "heroes". Someone heard this and called the website who thought "hey this will get a lot of hits!" and thus a BS story like this is born.
The movie isn't even a week old. I doubt Paramount and Hasbro has even decided if they want a Transformers 4 or a reboot much less who is going to replace Michael Bay as director. With rare exceptions of the $20 million per movie actor range sequel with existing cast remaining in place, casting decisions are not made until a director has been chosen. No sequel decision = no director = no actor = no Jason Statham. This kind of talk is literally designed to get people to click a link or post a link to their site for what they know even as they post it to be complete BS. I am purposely not linking to their nonsense story as would prefer to not encourage link bait crap like this.
Update: Sadly this story spread to most of the major entertainment blogs, with many treating it as a much more legit story than it deserves (and proving their lack of editorial integrity). Enough so that Michael Bay felt a need to stop by Shoot for the Edit.
No completely false. No 4th Transformers movie even exists right now. Thus no one is being considered at this time. How bout, just enjoy the movie out right now.