I really enjoyed All-Star Western #0
and was a bit surprised to see TN landmarks used in the story. Those would be Fort Donelson and the Cumberland River for those who might've read it.
Thought Aquaman #0
was also good but it did end without being as much a complete story imo. Left avenues open to explore when we jump back into regular numbering like all the #0 issues it just felt less complete a story in and of itself.