Totally agree.
Heh, this reminds me of a line I wrote for Roxas in a fanfic I'm working on:
"'But...I never really felt like I didn't have a heart at all, I always felt like it was there somewhere. Just...kinda out of reach. Maybe it was because you were still around.'" (referring to Sora)
^ It's pretty much just my opinion, but it sums up this theory well ^_^
And maybe that is just how Roxas and Namine felt: That their hearts are there somewhere; sort of there, sort of not there.
It would certainly explain why Roxas said to Diz: "My heart belongs to me!"
If Nobodies are supposed to pretend that they have hearts, and Roxas seemed to barely remember what a Nobody was around that point (though he may have remembered after his fight with Axel, who knows), how would he know to do this? Plus, it definitely didn't sound like he was pretending, or lying about it.
And of course, we all know (or should know
) that Axel said Roxas made him feel like he had a heart. That may be because of the close bond they had as Nobodies, or, perhaps it goes even deeper than that. Being with Roxas may have made Axel reconnect with his own heart in some way, or perhaps his and Roxas' hearts are linked somehow. (Kind of alluding to Ven here, heh)
Since the official KH2 novel (in Japan) states that Axel returned to his original, perhaps (geez I'm saying that word a lot today) him being with Roxas (and maybe Sora as well) helped that come to be.
I for one can't wait for 358/2 Days and BBS xD Maybe some of these questions will be answered.
Also, I'm very interested to see what happens in the future of KH with Roxas and Namine, because for all we know, a Nobody returning to their other without that whole complicated coming-back-from-limbo process (that Nomura laid out in an interview); the way that Roxas and Namine did, has
never happened before. And as we see in the ending of KH2, when Roxas and Namine smile at each other, they are still
there.
And of course, the fangirl in me screams for an Axel/Roxas reunion XD
Oh, btw, I kind of got the impression that the Final Mix scene with Axel and Roxas was a flashback type of thing, since the flashbacks of Roxas getting his Nobody name and of his fight with Riku were played at around the same time...in what order, I don't know...but I thought it might've been flashing back to when Roxas was contemplating leaving the Org...I was probably wrong -_-'