Aspirinsmurf
Hero
In theory, I think there are parties with grounds to sue them for anticipatory breach if and when this illegal "notice of deathorization" is supposed to take effect.I do not believe there is an action there. I wish there was. If it went to court it would be because Hasbro brought an action.
Prima facie, I also think that some parties might have other grounds to pursue legal action against them right now, for tortious interference, as an example.
However, there's very little to be gained by doing so. WotC could still back off. So I guess we'll have to wait and see.