Walmart is not on the list. They don't do publishing of any kind. They are a retailer, and expect ready-to-sell items to be delivered to them. It would require an entirely new business model for them. I would expect Quicken Loans to be interested before Walmart, and I give that a -100 probability.
Disney, on the other hand, IS a publisher, already HAD bought game studios, and HAD an MMORPG of sorts ("Pirates of the Carribean") before we approached them.
This is TF Hail Mary, not TF Grasping At Straws.