I don't get the thought of NU fans not "wanting" a rivalry with Iowa. "Rivalry games" are fun games for the team and fans to get excited about and mean a little more. If you want to have the opinion of "NU doesn't have a true rival" then do you get more excited for any games on the schedule, or do you look forward to certain games on the schedule? I know all the games are important, but more often than not, the Big Ten West is going to come down to games against Iowa and Wisconsin. When you add the hatred/dislike between fan bases and the results of the past few years, I don't think there is anything wrong with NU fans embracing a rivalry with Iowa.
I get sick of NU fans having the opinion that "Iowa isn't worth having a rivalry with". I get it, Iowa hasn't done much on the national stage, but It's been a long time since Nebraska has either (as shown by Scratchtown's post). I know we all want NU to get back to national prominence, but let's start with getting back to prominence within our own division.