CAST
Not sure if Warner Brothers will, but they should.
Rather than creating a new storyline, sticking to the first two episodes of the series would suffice.
Starting off with 40 year old Bruce Wayne on his last mission, troubled with chronic pains that lead to his weakness in using guns as protection. He soon vows never to return as batman. 20 years later we meet terry McGinnis. A high school kid, who doesn't excel in school and is known as a hot head with a short temper.
One night at a party, the jokerz show up, taking Terry's girlfriend, Dana, as a hostage. He fights them off but, getting caught up in a chase, leads them accidentally to Wayne manor.
McGinnis crashes his bike, in order to avoid buce who is standing in wait. After fighting them off, Bruce falls weak and is helped by terry into his home. McGinnis assists Bruce, and soon leaves. After being scared by ace, he finds the secret tunnel to the batcave. He is soon kicked out by Bruce who has awakes from a short nap.
Well, you know the rest. McGinnis steals the suit in order to track down his fathers killer. He soon gets revenge and becomes the assistant to Bruce Wayne. Aka the new batman.
This storyline could work well, especially with a franchise that would be shaky at the box office, depending on how fans view it.
Who knows, maybe we could see batman beyond on the big screen sometime soon.