It helps our conference to have two national champions in three years and from two different schools. I think there will still be a fight for survival among the power five conferences and the Big 12 and ACC are the most likely losers. Two champions would improve our profile.
I will, of course, be rooting for the Spartans int he second game for reasons I've explained before. But if you like underdogs, you root for the teams that have the fewest championships in their history. Clemson has 1 title, (1981), and Michigan State has 1 1/2, (1952, and 1965 when the writers voted after the bowls but the coaches didn't so they returned their #1 ranking)). Oklahoma won in 1950, 1955, 1956, 1974, 1975, 1986 and 2000. Alabama won in 1961, 1964, 1965, 1973, 1978, 1979, 1992, 2009, 2011 and 2012.
That said an Alabama-Oklahoma confrontation in the final would be a fun battle football overdogs.