Sorry, I'm on a tablet and do k ow how to take decent snapshots, but go have a look at Zombie Yeti's Facebook account.
Nuclearblastusa is nuclear blast records.
Now go have a look at their band roster.
I'd say Slayer and Danzig are their two best known bands, and both fit with that devil figure.
Although both bands are far from the mainstream bands stern usually does, maybe they're looking to undercut the boutiques like spooky the same way the big beer Brewers are coming out with a bunch of "microbrewery" brands?

Here's the post.
This looks like some kind of devil giving a devil sign. That says either Slayer or Danzig to me.
Slayer is much better known, but also way less mainstream than any of the other Stern music themes. Danzig's imagery would work pretty well with this too, but even less mainstream than Slayer is.
I have a hard time believing Stern would do a Slayer machine, but I don't see what else it could be...

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Can't get much more obvious than this. Unless Stern is putting out some Pinball Arcade-only Slayer machine, there's a Slayer pinball in the pipeline.
Reign -> Reign in Blood, Slayer album
Nuclear Blast USA -> Slayer's record label
Stern -> Stern

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