This whole Pandorica malarkey was created out of Amy's memories, this is now a fact as of the latest episode.

The future BizarroDoctor went back and told Amy to remember something from her childhood wayyyy back. The logical thing for me is that whatever "it" is will now save the Doctor, especially with his latest line about nothing ever truely being forgotten.

Nothing groundbreaking I know, and hopefully I'm not repeating anything because, to be frank, that other thread got heartbreakingly big and I couldn't face the whole thing...