NT is working very closely with capcom japan to let them know when things are getting too far away from what is needed in a DmC game just like how NT's dante had to go through 100's of rejected ideas from capcom for capcom to finally say ok thats good. Now, If they fight why does one of them have to "win"? couldn't it be where you dont kill sparda or defeat him but get through to him and that has happened in many of games where you technically beat the enemy but they get away, why cant he break through with his dad. a similar scene nto when u fight vergil on the top of the tower the first time you technically beat him by depleting his health gauge but he ends up stabbing you, why cant we deplete spardas health gauge but in the cut scene it shows he was toying with dante then dante finds a way to get through to sparda and sparda realizes he is fighting his son and ends up helping you in some way before returning to the afterlife.