This is to EVERYBODY! For those of you that have beaten the game, We all know it was said that he does posses the blood of Sparda. And yes Dante gave the Yamato to Nero , but not in the same scene when Dante says "I gotta keep it in the Family."So thats way to up in the air to determine anything.  And as to Neros D.T looking like Virgils demon form, Remember in DMC 1 that Dante had no form of his own to speak of, but rather gained his forms from the possesing demons of their respective weapons(Alastor=Lightning demon,Ifrit=Fire Demon,Sparda=Sparda). So everything that all you all say, including me, is just speculations, NOTHING MORE!!! So just chill out and enjoy the games! GEEEZUS.