Board Thread:Spoilers!/@comment-24104343-20131028180524/@comment-11464223-20131028210302

It's not Mendell >.>

The creators have stated, repeatedly, he is very, very, very, very dead. It's also not Rumple, pretty sure it's not Colin, or Ariel, I doubt it's Liam... ._.

Also as to Rumple's father's name being Colin, it could be just a casting call name.