And that is all just your personal theory...

The story of DMC2 is completely irrelevant with DMC3's and 1's storyline, so don't base your assumptions on that. And what makes you think the Sons of Sparda can't be killed? Yes they can, even though they will take a lot more punishment than a normal human. And it is just a popular assumption that Mundus brainwashed Vergil, not a confirmed fact. In the light of the new information, Mundus may have actually killed Vergil, and used his soul to create Nelo Angelo. So we could say that Nelo Angelo is just Vergil's "ghost in the shell''

the fact that mundus killed vergil and used his soul to create nelo angelo is not also a confirmed fact. even if nelo angelo is vergil's soul ow was he able to remember his ''mummy's amulet'' wen he tried to choke dante.....Anyway u might be right,i might be right....but in any case we jst hav to wait and see.I hav a feeling dat capcom has a suprise in store 4 us,lets say by bringing vergil bck 2 dmc4 somehow..wat do u make of dat??