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Okay maybe David Chase plays Shakespeare and kills off TS (with a few wild plot twists) in the expected and "natural" tragic ending.
Frankly however my guess is Tony Soprano lives (although hugely damaged and probably his wife and/or kids dead) so a feature film can be spawned.
Ironically this choice is fitting for a post-modern gangster character. Not a fun answer but you know the producers have thought about it.
It'll be fun to see if it ends up being about art or money.