As much as I would like MI3a to become a reality, I don't think it will ever be and I see 2 reasons for that:
- When Pirates of the Caribbean came out, many people saw it as MI rip-off. Now that Disney owns MI IP, their PotC is secured from future attacks. So, they will never sell the MI IP to Ron.
- They couldn't license it either to Ron because by doing that, they would diminish the value of the MI IP for 2 reasons:
Everything from MI3+ would be considered non-canon and lose value
They would admit that MI is nothing without Ron as a pilot
Please, prove me I'm wrong!!!