Even after he didn’t practice last Wednesday and Thursday, Panthers quarterback Cam Newton claimed he was “on track” to start in the season opener he eventually had to watch. This week he’s truly on track.As far as if he will put his cracked ribs at risk by being his typical-mobile self, don’t expect the guy who calls himself ‘Superman’ to play much differently in Sunday’s home opener against the Lions.”Playing this game, you can’t hold anything back,” Newton said. “I have full confidence in my offensive line. They had a great game last week, and I’m depending on them not only protecting myself, but having a great game running the football as well.”When Newton threw his first pass Wednesday, he was already ahead of last week’s schedule. He wasn’t sharp in the 20-minute portion of practice open to the media, and head coach Ron Rivera admitted he’s “concerned” about Newton’s timing.But after missing the first game of his football-playing life last week, only a setback in the next couple days will keep Newton out against the Lions.”There’s not a Sunday that goes past that I’m not excited to play this game,” Newton said. “I feel as if I’m a lucky individual to have the opportunity to play this game, and when I do have the opportunity to finally play, you can bet your last dollar I will be excited to play.”