That clue was for Nationals - and the original post said a city of around 100k in the Midwest with an arena that seats about 12k.
As I pointed out there is one city in the Midwest that fits that criteria and that city just happened to host the 2023 Synchro Nationals. So, I'm betting on Peoria IL for Nats.
As far as Skate America, I could see the Orleans in Las Vegas again. There is a smaller arena in Henderson NV that seats 6k and they've used Henderson's rink (not the arena) for Champs Camp and Pacific Coast Sectionals in 2023, so I could see them going there instead of the Orleans.
I don't think Lake Placid is an option they're all that interested in unless they just can't find another venue - the travel to and from Lake Placid is too much of a hassle and they will want a location where they can at least get SOME people in the arena, even if it is just locals.
World Arena is certainly a possibility too and easy enough to organize - travel to and from Colorado Springs is better than to Lake Placid.
I do think ShoWare Arena in Kent WA (which hosted SkAm in 2012) is also a possibility if only because the arena seats about 6k and, like Henderson or Colorado Springs, is much more easy to travel to than Lake Placid. Plus, it could draw in Canadian fans from Vancouver who don't want to travel far for either their Nats, SCI or Worlds.