It's tough to envision ND showing up in the title game again, although the 4 team playoff may give them a better chance. Even if they do, they got absolutely steamrolled by Alabama, and it seems likely the same would happen against any of the other big boys they may meet. Their schedule each year is pretty tough, so going undefeated again isn't very likely, which would be the way you could see them getting back there if they were to. USC, Stanford, Michigan are on their schedule every year. It was a prefect storm for ND this year to get there (USC being down and Barkley out, squeaking by Stanford, unreal comeback vs Pitt after how many missed FGs), and they got bitch-slapped in the title game.
It's simply my opinion, so none of this is close to fact, but I don't see how ND gets a sniff of a title game for the foreseeable future. This was their year, this was their shot...and they got embarrassed. They aren't affiliated with a conference, which I think puts them at a huge disadvantage. I know there are many "tie ins" for ND to get a "final 4" game, but going undefeated seems the only likely way that would happen again.