If I understand the highlighted text above, Franchise Gaming Brands (e.g. - Magic, Monopoly and presumably others) represented $537.7MM in revenue in 2016. That's 10% of their total revenue and a third of their total gaming portfolio.
On top of that...
Seems pretty illogical that they would move a cornerstone of their gaming portfolio that they simultaneously describe as a "competitive differentiator".
But of all things that make me skeptical of a looming sale, it seems counterintuitive that they would dump millions into Arena just to move it. You would think they would sell prior to making that capital investment with the idea that the buyer could make that investment themselves.