Out of curiosity, why don't you think that the character is Nerevar reborn?
He/she could be, but he/she doesn't have to be. I think it is up to player. My PC were never the Nerevarine. I believe that Azura was just scheming to take out her enemies. Yours could be Nerevar reborn. The thing is that it was never confirmed to the point where you could deny that you were the Nerevarine to Dagoth Ur.
Nerevar and the Nerevarine had very, very different lives and very, very different accomplishments.