It really depends on what the C's know about Marquis. I know everyone wants to assume the worst, but it's also quite possible he is back by the playoffs.
That doesn't mean that I still don't look for a trade. Personally, knowing that we have to play some great wings in the playoffs and that we'll likely get in foul trouble, I'd like to have 3 guys who can play the 3. But what I do mean is that if Danny is confident that Marquis can come back, then maybe we look to deal Nate instead, and then swing everyone down one spot (West to the 1 and so on).
Still, I'm not sure there's a market out there for Nate. It really sucks that Danny gave him that second year. I think in some ways this is Danny's lesser Scalabrine deal. If there were no teams out there willing to give BBD more than 3 million a year after his very impressive run in '09, I can't believe that there were any teams even close to matching the 2 year, 9 million dollar deal that Nate got. I'd be shocked if there was anyone willing to give him more than the league minimum.