The face-off between “Thor: Ragnarok” (opening in theaters Nov. 2) and “Justice League” (out Nov. 17) is just the latest collision between Marvel and DC, the venerable comic book publishers who have been producing four-color adventures since the 1930s. For decades, the two companies have ruled the spandex world, fighting one another for superhero supremacy.
Like any competitors in lucrative industries (think Coke vs. Pepsi or Apple vs. Microsoft), Marvel and DC have, over the years, tried to get the better of each other by launching price wars, stealing talent and crowding the enemy out of the marketplace.
