While not definite, it sounds like the small cable providers in Nebraska that have signed on to the BTN will be showing the Nebraska games, just on a different channel that will not be available to Time Warner customers per this article.
http://huskerextra.com/sports/football/article_30bf82b5-745a-5590-a52a-54bdee80232c.html
"Without the change, games still could be shown on an open channel instead of the channel assigned to BTN, and those games would be labeled 'Big Ten Conference' instead of BTN, Silverman said."
And although it is not clear from this article, I would assume that Directv and other national providers would be given access to this channel as well. If so, the national providers would simply need to be willing to provide the bandwidth. Directv almost certainly would (Fox relationship and all), and I can't imagine any other rational provider declining the option to show Husker football.
Unfortunately, there is no motivation for Time-Warner to agree to the BTN's terms until the last possible second (why pay .70/month per subscriber until you absolutely must?) I wouldn't sweat it yet.