Not trying to poop in the punch bowl here, but it's my honest opinion that different liquids in a water pan won't significantly enhance the flavor of the cook. It would perhaps enhance the skin, just like when you mop or spritz.
With that said, changing what's in the pan can effect the boiling temperature of the solution. For instance, you an add bout 10 degrees above the normal boil temp to a salt water solution. Not as big of a deal cooking poultry because of the high heat, but still worth mentioning.