If Hasbro decides to give MLP away, there are a few rights and wrongs.
The first one is if it went to Disney, as many people who replied said. It would probably ruin the Franchise because of how Disney is really greedy and evil.
If it was sold to Sony however since Sony is more relaxed on copyright the franchise could make a few changes, but Fanwork would still be allowed by that company. Plus they are not as greedy as Disney or even Hasbro would be.
So I recommend MLP staying with Hasbro for now, but if they need to sell it I recommend selling it to Sony.