Todd Spangler NY Digital EditorAnthony and Joe Russo are huge fans of “Fortnite” — and the filmmakers, known for their blockbuster Marvel movies, teamed with Epic Games to direct the cinematic opener for the popular battle royale game’s latest installment.Epic on Tuesday launched “Fortnite” Chapter 2 Season 6: Primal, which the company says is the most story-driven event it’s ever produced for the game.Anthony and Joe Russo, in a statement provided to Variety, said, “It’s been fantastic working