Mojang themselves came forward with an explanation.

Supposedly career lawyers will just jump ship and contest literally anything that might have even a chance of sticking. Regardless on wether they actually want to go to court, there is basically zero downsides to making legal threats and those lawyers feel like they are paid for doing exactly that.

Mojang contacted Bethesda and they settled the matter through a counter strike game.

Personally i believe mojang did the math and saw that regardless of any outcome this was an opportunity for free publicity for the new game.