They've lost two or three games in the last two years. One was in the state final and the other was the state semifinal, so maybe it's a little premature to write them off.
Reasons to think they will be great:
Talent. They are usually loaded with talent across the line, and I'm sure the next lineup of stars is ready to make an impact
Reasons to think they won't be dominant:
Coaching. Their game plan vs Westlake in last years semifinal seemed strange at best. They were very conservative and were still running dive plays into the line in the third quarter when they were down big. They may have lost more than we understand in the coaching department.
QB. They are replacing a four-year starter who won two titles, and played in a third. Good luck at Auburn, Dematrius Davis.
Competition. As @Helobious pointed out, there are some ascending programs in their region, namely Atascocita.