My sources tell me that Matt Duchene paid a visit to Daryl Katz' house in Edmonton today. My gut tells me it's a swap with the Oilers having to send Ryan Nugent-Hopkins and a 2019 draft pick due to Nuge's contract being longer. Here is the tale of the tape. Green highlighted cells indicate advantage over the other.
Relatively even players, except Duchene is nearly 50% better than Nuge on faceoffs and Duchene was on a terrible team last season (hence the -34 +/-), but overall, he appears to be a better value than Nuge is right now and you're not locked into Nuge's salary. It also gives you time to find and wait for Puljujarvi to take McDavid's right wing so you can slot Draisaitl back to 2C and then look at trading Duchene.