I remember the Bucs in that division well, if only because the "Battle of the Bays" was an interesting matchup. These were the Greeg and Infante years, so Green Bay was mediocre itself. Tampa along with Atlanta and New Orleans in the NFC West were the big geographic anomalies at the time.
I'd love it if the Cards could develop a genuine reciprocal rivalry with someone. It's hard to come by with AZ pro sports. The California teams have better rivalries with each other, and for whatever reason Denver and Salt Lake teams haven't turned into rivals yet. I guess you need long-term competition on the field, or a genuine civic rivalry, and Phoenix really only has that with LA (one-sided) and Tucson. I guess growing up I got sick of hearing about how great Chicago was--from people who chose to live in Arizona--but even that was more of a minor annoyance.
Vegas could be interesting, but that'll probably end up being the NHL, which won't be the same. And I wouldn't be surprised if Vegas fans' attention was directed towards LA a lot, just like ours.