I know that this is not the first time we hear about this rumor, but this time it's from a different source who proved to be absolutely legit with his statements about DOTM even before they started filming. Here is what he said at TFW2005:
So this is the third source for a back to back shoot in 2012. And I personally trust this one 99%.Yesterday I got confirmation that they will be making a Transformers 4 & 5, I can not say how I am involved with the movie(s) But they are planning on shooting both back to back late 2012.
Even I will expand the rumor and say that I think Michael will be returning as a director. The reason I say that is because of his latest statement here that he is starting prepping his new movie. The reason to start prepping for P&G so early after DOTM could be because he wants to be free at the end of 2012 for TF. This would be great. This is just my interpretation so take it with a grain of salt. But if you look at this article from a month ago, you'll see that it starts to become reality:
If this rumor is right, then we can expect a 2014 release of TF4.Michael Bay has previously stated that he will not return to direct Transfomers 4, although it looks like he may come back after all. Sources claim the director may be able to squeeze in his bodybuilding movie Pain and Gain before Transfomers 4. Paramount is eyeing a late 2012 or early 2013 start for Transfomers 4, so Michael Bay may be able to make Pain and Gain between then and now
Here is the thread that the TFW2005 member shared the rumor:
Here is the old article: