Spoilers.

Personally, I hope it doesn’t end up being a matrix in a matrix. And I don’t think it will. But if it is, I wouldn’t be *that* upset. Because philosophically, it’s justifiable. There was an essay on this, not sure if on the website, but yeah, the essayist was saying how the “real world” Neo escapes to in the Matrix is philosophically lacking because the criteria used for saying it’s real is the exact same as within the Matrix. The stuff Morpheus tells Neo, what is real, blah blah blah, to explain how the matrix can be true, that’s all they have in the “real” world also. So there’s no philosophical justification for believing the “real” world is real and the matrix isn’t.

So matrix in a matrix is philosophically reasonable, if that’s the point they want to make. I don’t think they will though.