The Lions traded for Hill earlier this offseason to solidify depth at the quarterback position and give Matthew Stafford a competent backup. His contract only had one more year (2010) left on it, however. The Lions obviously like what they have seen out of Hill so far this offseason, though, as another year has been added to Hill's deal. His contract now will keep him in Detroit through the 2011 season, meaning the Lions' quarterback situation is pretty much set going forward.
The only real question mark at the quarterback position is Drew Stanton, who really needs to show something to coaches this year. He only has one season left on his deal, and unless he really improves from what we saw last year, the Lions won't have a reason to bring him back. It's not like it's tough to go out and get a third-string quarterback, so that could be one change we see next year. The top two spots, however, are locked in with Stafford and Hill.