It is not the point of who has held what belt or why the point is MVP had talent and to be honest it was not show the right way after he almost had to retire from that odd disease I think that may have made him more less of a main event in the eyes of certain people within the WWE.
As for him heading to TNA after his 90 days no wrestling thing I doubt it according to his twitter he seems to be content with going to Japan, and working for NJPW. Which I believe may be a good move for him considering that TNA would be a HUGE waste of his talent because TNA can not find it's ass right now!