Fortnite’s ongoing story currently involves a plot where the game’s characters could use the help of some additional heroes. The world could always use more of them, I’ve heard. And that’s how four Overwatch characters have been introduced into the world of Fortnite as part of its current season’s Act Three events. OW heroes Tracer, D.Va, Mercy, and Genji will be joining the ever-growing ranks of cosmetic skins tomorrow. But that’s not all. Epic Games says that tomorrow’s update will also add “new weapons, landmarks, and more Overwatch inspired fun as Act Three progresses,” including a new point of interest inspired by an original OW map from its 2016 launch, King’s Row. A mega bundle including all cosmetics includes four skins, four backblings, four pickaxes, one glider, three emotes, a wrap, and a loading screen. And it’ll likely cost quite a bit of V-Bucks, but thankfully you can buy each skin individually if you only want to rep your main.…