Honistly, how can something with no emotion "Want"? IMO the members of the Org never "Wanted" hearts - or anything for that matter (Except for the strange ones, Xemnas, Roxas, Xion, Nom-a-nom-a-nomine) they were simpley half-non-existant being that were emulating what there somebodys WOULD do in that situation, but never really "Wanted" anything, or even cared, because they wouldn't fade into nothingness, they already WERE nothingness - they never existed in the first place, there was nothing there, just a reprosentation of their somebody.
Also Xemnas (Seperoth 2.0?) - My Fav KH char - Is making a reaperenece apparently, this quote is taken from the KH wiki page on Xenhanort:
"Would a single one of you suffice if what you faced was not a single one of him?" —Yen Sid to Mickey about Xehanort
Following the complete debugging of Jiminy's Journal, Yen Sid informs Mickey that Xehanort has been revived following the defeat of Ansem and Xemnas, and further warns him that more than one form of him may have returned.