Plot hole: When they rescue the boy he is with Gary Sinese. Surely the boy could hear his voice and tip off authorities he was one of the bad guys? Yet later in the movie when Sinese comes by the home for his reward, he hears Sinese's voice and recognizes it.
Plot hole: There is no reason that Eden Hall couldn't have accepted the Ducks and also kept some of the JV players as well other than they didn't want to hire more actors for the team. Keep in mind, by the time the Ducks actually attend E.H. they only have 12 players (with two goalies). Once Banks gets transferred to Varsity they only have 9 skaters. Surely they could have allowed the cut JV players to rejoin the team since they barely had enough skaters for 2 full lines.
Plot hole: Malloy and the others tell Snake that the Plutoxin 7 virus would cause nervous system shutdown without the antivirus. When he got back, it was revealed that it was just a hard hitting case of the flu. Why then did, at the base, the computer showing his countdown timer over the course of the film say when nervous system shutdown, not the full extent of the flu, would occur. Maybe for sake of the audience to avoid a spoiler, but those who had already seen the movie would notice this.
Suggested correction: Because the countdown timer was lying to him as well. It was programmed to do so.