[quote=@Amphibious Assualt]5.) On to the half of Exclabiur bit, it hasn't been even introduced yet, the sword isn't brought in the story yet. At this point, it still sits in the stone, and Dean has not blown it up yet. So that is a No Go.[/quote]

Actually, it is not Excalibur in the show but another sword like it. Excalibur is mentioned, though.