He'll have his eyes on either Ryan Garcia or Rolly Romero. Those are the titlists he could potentially beat. At 154 I don't think there's a weak enough option, he'd be better off going for a belt at 160 than trying for one at 154 because the competition is stiffer at 154 right now.
Benn's a good fighter, but I don't think he's a legit Championship level talent. He's one of them guys that will always need to be carefully matched to keep coming out ahead.