"I think it was the opportunity to tell a story that was based on a world and characters that I felt were just compelling and optimistic and the opportunity to treat that universe with a kind of energy and excitement and the resources we had," said Abrams. "It didn't feel like a classic reboot or prequel. It is a brand new thing inspired by characters that are poised to make a big comeback."
No, it's an alternate timeline created by time travel.
It may start out post-Nemesis, but it will end with a new timeline. Essentially a reboot.
It ticks me off that these people don't have the balls to just say so.