User blog comment:The-Psychid/Why is it Always the Guys?/@comment-1756703-20100318202217

If it's any consolation, both TDA endings are official, according to Thorny. Sure, the fans voted for the Duncan ending, but that doesn't make the Beth ending invalid.

And with the way the third season is shaping up, it wouldn't surprise me at all if they went with the Beth ending as the canon ending. Why else would Duncan return?