Making NFL predictions is a lot like selecting players in the NFL draft. If you're hitting on 40% to 50% of your picks, that's pretty good.Every January, ESPN asks industry sources to forecast the season. The possibilities are limitless, from free agency signings, retirements, contenders and pretenders to trades and MVP favorites.Last year's forecast yielded a few duds (Russell Wilson to the Raiders, Packers to the Super Bowl) and a few winners (Kirk Cousins to the Falcons, 49ers taking a step back).The proverbial crystal ball is foggy, with the ripple effects of the offseason just beginning. Five of the seven available head coaching jobs are still open as of Tuesday. Who fills the rest of those roles will have a major impact on roster planning and the proverbial dominoes that fall around those moves.Several starting quarterbacks could be changing teams. The trade market should be robust yet again. And someone has to win the AFC South!