I once ate at a Taco Bell in New Mexico, and they were serving green chile sauce--something unavailable at any other Taco Bell that I have been to. In a state where the motto seems to be "red or green?" (i. e. what sort of chile sauce do you want?) they must be trying to conform to local traditions.
I’ve seen packets of salsa verde in Taco Bell recently. But I skip them in favor of the “Fire” packets.