I understand Travis, we've seen Dolph Lundgren in some very good entertaining roles and its impossible not to compare today and the past.
Detention, he chose it simply for playing a teacher (as said in that "Afta Skool Special" its something many imagine doing.........then comes the easy paycheck, there were no real fights at all, minor stunts......so its a comfortable role.
Probably just having american high school students in a movie makes it bad..........but oh well, watch it anyhow and hope for the best next time for our man!