It is no surprise that Lewis Hamilton is one of the best drivers in Formula and has had most of his success in Mercedes. But none of this would have happened if he didn't officially announce his departure from McLaren and joined Mercedes on September 28th, 2012. Looking back on this decision it was the best career move in history but at the time it seemed like suicide. So let us go back in time and speculate 'What if Lewis Hamilton stayed at McLaren'.