If this were a bingo card, "a popular mechanic returns tweaked with a new name" would be the free space in the center.
I was going to say that the "Artifact Creature – Clue Fish" would surely be named Red Herring, but then I checked and found that [[Red Herring]] is already a Mystery Booster card, and it isn't an artifact. Would they reuse the name, considering that the existing Red Herring isn't tournament-legal? Or will the MKM card have a different name, while obliquely alluding to red herrings in some way?