While Bay and Walhberg are actually working on a different movie, it seems all the "internet chatter" may have given Bay an idea.
Check out what Michael Bay posted on his website.
Don't count Mark Wahlberg out just yet.
I squashed a rumor that was on the internet last week. It was about Mark Walhberg. Mark was rumored to be staring in Transformers 4. We are working on another movie together, not T4. I had such a great time working with Mark on Pain and Gain, and he gave such a great performance – well let’s say that very internet chatter gave me some ideas. We are at the inception of our story process right now on T4. Let’s say some ideas are gaining traction with me and my writer – so I’m here to say thanks internet chatter.
Transformers 4 has a June 27, 2014 release date.