DENVER – Denver quarterback Peyton Manning makes his highly anticipated Broncos debut against the Pittsburgh Steelers while his hand-picked successor in Indianapolis, Andrew Luck, begins a new era for the Colts on the NFL's season-opening weekend. Manning missed last season following neck surgery, leading the Colts to make the painful decision to cut the four-time most valuable player who broke all of the franchise's major career passing records and led them to their 2006 Super Bowl triumph. That move was made somewhat easier since the Colts had the No. 1 draft pick to use on Luck, who is widely viewed as one of the most complete quarterback talents to enter the National Football League (NFL) in recent years. The Broncos believe Manning, 36, has plenty left to offer and so they traded last season's biggest story - unorthodox but hugely popular quarterback Tim Tebow - to the New York Jets in March, a day after landing Manning. The Steelers, who will visit the Broncos for a primetime matchup Sunday, have seen enough of Manning over the years to know not to underestimate his ability to turn it on when the spotlight is on him. — Reuters