According to a recent product page on the official site….
Both SPYRAL and Subterror will be receiving new support in Circuit Break! Straight from the product page of CIBR:
They went into hiding after Maximum Crisis, but now SPYRAL and the Subterrors have returned with Link Monsters to update their strategies for a new era of Dueling! Summon a “Subterror” Link Monster that can hit the field with up to 4400 ATK, gets your best Flip monsters out of your Deck, and then Summons them! Guess what kind of card is on top of your opponent’s Deck (make sure to peek first with SPYRAL GEAR – Drone) and the new “SPYRAL” Link Monster can Summon any “SPYRAL” monster from your Deck. Of course, it also counts as SPYRAL Super Agent on the field and in the Graveyard, so you can use all your “SPYRAL GEAR” cards with it!
Seems like both themes might be getting a bit more search power with these new Link monsters.