Originally Posted by TheLastHokage
Tobi couldn't be Tobi, his Soul was sealed by the 3rd.
He could have been involved tho.
What's your point? the 4th hokage got sealed by that god of death way before the 2nd did, and we saw the 4th's chakra was still left behind. He was still able to speak and act (he used jutsu inside naruto's mind, albeit only for a little while) According to the way they revived orochimaru (who was also sealed away), as long as someone's chakra is left behind, they can be revived. That's what I see. That being the case, it's just as viable that tobirama was able to come back too.
Now I'm not saying that I think it's tobirama, as there are factors for several candidates all over the place. That being said, it isn't as 'debunked' as that.