As a shareholder in Hasbro, I bought stock after they bought WotC, I can say, at least with as much visibility as I would have, that there has been no call for a vote to sell any parts of the company or subsidiaries.
While there was mention of the company making a larger profit off of it's lisences directly, instead of indirectly.
So, that said, while it wouldn't surprise me that Hasbro would sell WotC, I've seen zero mention of it to the shareholders who, from my understanding, would have to approve of said thing.
Your mileage may vary.