While it is a delightful theory, and ties into the Antarctic base rumors nicely, it is very safe to say that Hitler died in that bunker in Berlin. There are multiple eyewitness accounts of his body being discovered after his suicide, several of whom are still alive and available for comment today.
While the authenticity of the skull and jaw fragments are in doubt, the soviet records of the transport, burial, and subsequent disposal of the
remains prior to the east german handover in the 80's is fairly clear cut.
Not least of all, let us be honest, if Adolf Hitler had escaped death in Berlin, he would have been at the top of the hitlist created by Israel soon
after its formation. Given how quickly they obtained and executed Eichman, they would have found Hitler. How could you keep quiet the survival of the
most infamous man in modern history?