As long as the wim structure is not corrupted (it can be extracted) these things can be fixed. You don't have to use the setup, you can extract the wim to disc and make it bootable if you want.
Legit hashes from Canouna: MD5: F3AC28467258EC9F0ECEAF9690A0F06E SHA1: C21B69413E08FCFB756EEDB2B99D0C0472486D1C CRC32: 67F85067
I am sure some guys are still trying hard to work on the wim, it gives them something to spend the 4 boring days until June 1.
There is a possibility that the wim is legit, but the leaker had to delete the "OEM ID" and re-compile it, somehow along the road something went wrong. .......or maybe it's just a fake. People are working on the wim, I guess we'll know the truth, hopefully soon.