Who doesn’t love a good rivalry? McDonald’s & Burger King, Coke & Pepsi, British Airways & Virgin Atlantic, Barcelona & Real Madrid facing off in El Clasico, Manchester United & Liverpool’s fiery clashes, and Australia & England competing for the Ashes may spring to mind. Alternatively, DC Comics and Marvel Comics have been locked in an 80+ year battle to control the comics space. And then you have Adidas & Nike. Two juggernauts who for nearly 6 decades influenced sportswear and shaped the cu...