Storybrooke vanished as if it never existed, but it did in fact exist. Everything that happened still happened so we aren’t going to see anyone return from the dead. I don’t, however, believe Rumple is dead. I think the fact that he sacrificed himself for those he loves will play a role in it.
To quote LOST: whatever happened, happened.
But what happened to Rumple remains to be seen.
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"He was a lot of things to me" "The only conclusion was love"