This is by no means set in stone but of all the many scenarios on the Bills completed draft board, this is the one most likely to occur:
1) Bills open the draft taking a Tackle. It will be an Offensive Tackle as they don't seem to like Dan Williams quite as much as some other people do. Not saying he's definitely out, but he is probably a real longshot.
2) Bills then may well trade back up into the first round for another Offensive player they like. There's a distinct possibility that it will be Demaryius Thomas.
3) Marshawn will not likely be moved tonight, unless they stumble across in insane sucker. But make no mistake, he's hanging by a thread in Buffalo and may very well be on another roster before the weekend is out.
They are not locked into a particular strategy and are leaving lots of room for maneuvering depending on how the draft progresses.