I could see all kinds of crazy moves being made. Sherman could be traded. Bennett could be traded. Avril could retire. Jimmy Graham could walk. Heck, even Chancellor could find himself elsewhere. I don't think Wright and Wagner are going anywhere; the longevity at their positions is too good to let them go just yet.
I do think that the team is going to be forced into the route Padna outlines, though, with Wilson's continued growth. Watson is a GREAT young, mobile QB, but he doesn't have the ARM that Wilson does (at least not according to what I've read/heard/seen). He's mobile, but he's more like Kaepernick+ than he is Wilson, to my eye. Absolutely could be wrong; haven't watched many games this season.
I think the team just signaled their willingness to invest in the O-line with the Duane Brown trade. He's a top 10 LT, from what I've read, and *possibly* a little more than that (but he is likely on the back side of his career) so it will be interesting to see if they double down on that this offseason.