There is a deleted scene from Abrams'... effort, which shows Nero after being grabbed by the Klingons. It's supposed to explain why he waited eighteen years or whatever it is before actually doing anything, but really it rips off the Ceti Eel scene from Wrath of Khan.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'