Hey, at least we got Majora's Mask 3D and everyone is happy. Operation Moonfall was a success and aLttP fans get to experience a overdue sequel. 
To be honest however, I kinda doubt it is since Termina doesn't really have a "Dark World"-esque look. But there are still several ways to make this theory work such as the statues that look like they're licking the Triforce and the trippy effect when entering Termina. Another problem is the timeline, unless Termina was created during the events between SS and OoT which has to be explained in game in my opinion (not "Termina was made before OoT" but "many eras ago" or something along those lines since the timeline is made up of eras).
They brought aLttP to their attention let's hope they bring MM up to... And yes, I don't mean MM3D. 
Edited by Shane, 09 October 2013 - 07:33 PM.