What if Trump starts his own party?

Given that he's so ego driven, and he has millions of adoring fans, wouldn't it stand to reason that he'd try to take all those fans, start his own party, and keep them going to his rallies and slavishly praising him? If he was the head of his own party, he wouldn't have to answer to any opposition or anything.
I have a feeling that this is something that keeps some of the higher ups in the RNC awake at night. He could potentially ruin the republican party for at least an election cycle or two. I personally highly recommend that he does this.