Making this tonight, I didn't have any of those spices so I just threw in the random chicken spices and other bs I had to mix with some good salsa I have on hand.
I think as long as one uses enough spices + a somewhat-flavorful salsa the actual ingredients don't matter too much. Just don't want to under-season.
Just made this again tonight, did not use any spices other than salt, did not notice a difference. I use a really spicy salsa though so your results may vary
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J J J Jay Unit To The Moon
Yeah, you can improvise a lot of stuff. I've used salsa, canned tomatoes and garlic, you can adds beans and make a pseudo-chili. You can also use pre-packaged spices (typically, the mexican stuff works best).