Episode III sure wouldn't have much left with all those cuts. Honestly, I think this concept would work better just to cut out the Leia bits. Have Luke be named, or at least be dropped off with Owen and Beru. That doesn't harm anything. It might work to keep some of the Leia scenes in III, just don't name her. We could know that there was another, we just wouldn't know who.

How to reveal all of this info is another matter.

It feels good to be back on track! The idea of more EU in these movies makes me nauseated.