Actually a decent trade value for both sides. Not sure about the cap situation for the Preds. Oilers might need to retain or accept a dump which reduces the need to make this trade.
Zero chance Oilers are retaining on Nuge unless the player coming back is on sweetheart deal (like ELC) and Oilers probably won't take a non UFA/RFA cap dump either. The whole purpose is to gain cap space. If a replacement 3C plus Nuge "retain" cost nearly $6M then what's the point?
I suspect next offseason he will be traded for futures like previous "overpaid" Oilers like Petry and Schultz were.