
Originally Posted by
blackice_cc
Wait a minute here. There were no beings other than Twili, Link and Ganondorf inside of the actual Twilight realm, and both Link and Ganondorf changed form. When Hyrule is covered in Twilight, it does not make it the Twilight realm. It's simply covered in it. Any non-Twili to venture into the Twilight realm/Twilight covered areas cannot retain their normal form. Therefor they must change into something else, usually spirit type things.
The Midna's Mask being Majora's Mask is a very good theory in my opinion, but if it is true it wouldn't prove that Termina has connections with the Twilight realm. Nobody knows what happened to the Mask after the events of MM, and it could've fallen into the hands of the Twili, who were not yet Twili (possibly, according to some theories, the Gerudo of course).
All in all, I think this theory doesn't have enough solid fact. It's too much assumption.