Canon support for the return of Sirius and other dead characters (?)

[sawsan_issa]

No: HPFGUIDX 90524

For a long while I was sincerely in doubt that we would ever see
Sirius again in any form. I felt this because of JKR's confirming his
death in an interview and the way she explained it it seemed final. I
hated this feeling more than any other emotion that the book had
brought out. Now I have reread OotP, I saw hope for some sort of
return of the dead. I reread the part when Luna and Harry were
conversing at the end of the book. I will place emphasis on the parts
that seemed a bit hidden (for me anyway, I am not that much of a "read
between the lines" sort of gal).

These come from the chapter of OotP entitled "The Second War Begins"
UK version pages 760-761. The only two people talking in these
snippets are Luna and Harry.

"There is no need for them to take your things" he said flatly. "D'you
want help finding them?"
"Oh, no," she said smiling a him. "THEY'LL COME BACK, THEY ALWAYS DO
IN THE END. It was just that I WANTED to pack tonight..."

Then...

"Yes, it was rather horrible," said Luna conversationally. "I still
feel very sad about it sometimes. But I've still got Dad. ANd anyway,
it's NOT as though I'LL NEVER SEE MUM AGAIN, IS IT?" 

Then...

"OH, COME ON. YOU HEARD THEM, JUST BEHIND THE VEIL, DIDN'T YOU?" 

Then...

"Are you sure you dont want me to help you look for your stuff?" he said.
"Oh, no," said Luna. "NO, I THINK I'LL JUST GO DOWN AND HAVE SOME
PUDDING AND WAIT FOR IT ALL TO TURN UP... IT ALWAYS DOES IN THE END... "

Ok, now I know that is not clear cut proof of anything, the only
seemingly hopeful part is the one where Luna tells Harry that they are
just beyond the veil. But, I thought how interesting it was that Luna
kept emphisizing that whatever she lost will turn up in the end, but
she really wanted them now.

That part made me think that maybe JKR was trying to tell us that loss
is not finite, and that eventually you'll get back what you lost,
though it may not be when you demand them. Or at least in Harry's case.

Now that can also mean that Harry will die and that he will meet up
with his family, as one of his enemies promised ( I think in CoS when
Tom was being a jerk in the end).

Or, perhaps that it means that in the end of the series, Harry will
reunite with Sirius and maybe Lily and James; though JKR promised that
we will never see a living James and Lily.

Any thoughts?

Sawsan