If a miracle happened...
And Angel was resurrected in some form...Say a Movie...
Do you think he would be able to get back into the character's head-space after nearly a decade?
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You Know Who The F#ck I Am.
Let me put it this way you'd have a better shot at winning a dozen jackpots in a row in a Las Vegas casino then you would at seeing Angel resurrected.
David's moved on and so has everyone else. The best you can hope for is a reboot.