Here's something I was offered today in my work league. A guy is looking to give me Greg Jennings and a low RB (maybe Michael Bush) for MJD and a low end WR. We're still in the talking stage, but with MJD's holdout going into the regular season it looks like. It's intriguing. Plus the league is PPR.
I'd say if I owned Forte that is a deal I'd probably take at this point. The question is what does the rest of your team look like? Do you have other RBs good enough that you can afford to sit on MJD and wait until the holdout ends? Same can be asked of your WR corp, is Jennings a significant enough upgrade that it really improves your team or do you already have 2 or 3 other WRs that can hold their own.