Justice League: The Flashpoint Paradox

As a child, Berry Allen's world was shattered when he discovers his mom had been killed on her birthday. As an adult Berry become the hero known as the Flash, the fastest man alive, but when he uses his speed to go back in time to change one event, the world pays the price. Everything has changed, heroes are killing innocents, a war between Wonder Woman and Aquaman is on the verge of destroying the world, and Batman uses guns to put an end to any criminal. Now the Flash must team up with Batman in order to figure out a way to return to his own time line before the world comes to an end but with the Reverse Flash there, Berry just might die in a world he created by trying to do a good deed.