Hrmm okay i tohught about this one on my own. i do not think Neji will die, i do however think Hinata will grow and taker her place as the head of the main house- how she does that could take a series pf paths, one of wich includes her asking to Neji's help. Naruto has changed Neji, and his way of thinking. In addition to having been changed, Neji knows the truth about how his father died- his hatred for the main house no longer runs as deep as it once did, or even as strongly as it may have run in his father.

Conclusion: interms of character developement, both on the side of Neji, and hinata it would be best to have Neji's continued growth pave the way for hinata. By doing so the Hyuga house wll become stronger. The seperation of the Main house, and the Branch house may take on a restructuring if not anulled alltogether. Again strengthening the Hyuga house, and intern the entire village.