Author notes: Spoilery for Teen Titans #51. You probably already know which scene.
You aren't stopped by the gun he's aiming at his temple. You have five ways to prevent him from firing it. It's his face. You are better at reading faces -and at understanding yourself- than you were before you became the Batman.
He's far more committed to not becoming you than he ever was. You cannot win. You keep down your bitterness, and wait for the moment in which the temporal wave will reach you and you will cease to have ever existed.
You wait... and then you remember having put a gun against your own temple, back when you were facing yourself. The exact moment in which you crossed the line you had to cross.
You smile and remember the sudden understanding of it as you see the light dawn on his face. Yours, now.
He throws away the gun, but it's already too late.