doing it right? arnold schwarzenegger, he's back in the gym but playing a new role. as an undercover trainer. working out at gold's gym, offering advice. >> you have elbows and you have knees. >> not always solicited. >> very nice. >> it's the terminator's charity after school all-stars, letting people bid on the chance to live like arnold for a day, all while supporting fitness. if that's not a cause worth celebrating, i don't know what is. >> and finally, how about an intergalactic reunion for a comeback. our heroes may be a lot closer to returning to the big screen than you realize. >> i like the sound of that. >> they have all signed on for "star wars episode 7." this would be a huge planetary new year's, even if our parent company disney didn't own the movie rights. >> that's a must-see. thanks for watching abc news.