You have your theories going against eachother, The EMP Drew Desmond toward the island, But it would make Michael Not return do to compass interaction?

And If you remember, they put it 2 different ways, At First they said Michael could not return because he would not find the island, But second they said if he told people where they were, He wouldnt be able to stand the guilt of what he did to get his son back.

My theory is Michael will come back without walt (Walt being safe somewhere) Because they cant use Walt much anymore, hes growing, The actual story has covered 40 days so far, But has really been 2 years, Meaning Walt is growing faster then he should. So either Walt is out, Or both him and Michael are out. One of the two. Either way Walt is gone for good, because they cant use him anymore.