Realistically, Javelin Guidry isn't going to survive the cutdown to 53. A practice squad opportunity with the Lions at some point this season is the only possible way I can envision Guidry ending up on the Lions 53 man roster at some point.
Morice Norris is coming off a disappointing performance in the pre-season opener at the Giants. If Norris can get relatively healthy later on this season, he might get a practice squad opportunity with the Lions in large part because of his play in training camp.