The creators of ouat had used Lost as a base for the Once project, cause it was seriously ambitious and no one was interested in ouat at that time, cause people thought it would fail, so yeah, they first created Lost to establish themselves. But, magic never fails, people do. So yeah, they have taken a lot of lost cast for this reason only. But Lost or not casting deserves an Oscar. To say its perfect would be to underestimate it. It's exceptionally flawless!!! A+++++++