User blog comment:Omega natsu2/Chapter 365: Fairy in the Jail!, Predictions./@comment-4829046-20131220051101/@comment-7418318-20131220110441

I doubt it, since we heard the young Obito in Kakashi's "Gaiden" flashbacks before, while his unmasked and adult voice was heard for the first time, so I take it he's taking about that.