Overwatch has a PS4 version isn't it? Then Blizzard already have an OpenGL version of the game, a linux port would be not that hard to do.
From France with love.
Laptop ROG : W10 / Ryzen 7 4800HS @2.9 GHz (4.2 GHz Turbo disabled unless necessary for better thermals) / 16 Go DDR4 / RTX 2060 MaxQ (6 Go GDDR6)
Laptop ROG : W10 / Ryzen 7 4800HS @2.9 GHz (4.2 GHz Turbo disabled unless necessary for better thermals) / 16 Go DDR4 / RTX 2060 MaxQ (6 Go GDDR6)