Need to play navy, noles, and gators at there places.
I understand the want to play certain teams and stuff, but there are a few things to think about. First of all, it's a two way street, both teams have to want to play, you can't just call someone up and say we're going to play you some year.
Second of all, a couple of the teams you mention very rarely play away games outside of their state or region. Going back 30 years, I could count exactly 3 times that Florida has played a non-conference away game outside the state of Florida; against Memphis, Rutgers (which was technically a neutral site, but it was in East Rutherford, NJ) and Syracuse, and Syracuse is the most recent of those in 1991. So you have to go back 25 years to find the last time Florida played a non-conference away game outside the state. Florida State isn't quite to that level, but still doesn't play many out of the region; and while they did come to Lincoln a few times in the 80s with no return trip by Nebraska, Florida State was still a lower level independent team at the time, and not quite the powerhouse they are now. I would point out some of the others that have been mentioned, like the SEC schools Nebraska has never played at their venue, many of those schools are among those that rarely if ever play non-conference games outside of their region, and Nebraska is not going to go play one of those teams on the road, without a return trip.
Thirdly, when referring to Navy. I know some think it would be cool to play Navy, but if Nebraska ever did play Navy, it is pretty unlikely it would be at Navy, it would either be here or on a neutral site. Navy's stadium has a capacity of 30,000; which is quite small and Nebraska rarely plays non-conference road games anywhere near that small (Southern Miss and Wake Forest come the closest, but those are rare, and probably even less likely to happen going forward).
