Like I said before, Zavec's stock in the American boxing fan's eyes have without a doubt risen and he can expect more recognition from boxing fans around the world after his fight with Berto.
From here I don't know what will happen with Zavec's future. He's 35 years old and just lost his world title. He also received a nasty cut on his eye from Berto and could be realizing that his body can't take this kind of punishment anymore and could be considering retirement.
Hopefully he doesn't, as he has proven he can still hang with the best in his division.
Here are possible options I can see Zavec pursuing:
Fighting Rafael Jackiewicz if he loses his WBA title eliminator against Kell Brook. I'm not going to say the winner of the bout because Kell Brook wants to eventually take on Amir Khan with a belt in welterweight. I say this because, why not? These two men have met twice before and have always put up a good and close fight with the series split 1-1. Why not have a rubber match in the US to see who's the winner between the two once and for all?
Another option is the winner of the Sebastian Lujan and Mike Jones match. Without a doubt, Arum is trying to raise Jones's stock for a future Pacquiao bout. A past champion like Zavec would look good on Jones's resume and make him seem that much better. For Zavec, both are quality opponents and would be more challenging than most of his opponents in the past.
Andre Berto is another option as a rematch. Zavec deserves another chance to get his belt back and prove he has what it takes to win. Like I said before, he was saving his energy for the later half of the fight. He was close on the scorecards too, so it's not out of the question that he could have won the fight on a decision.
My final prediction as a possible opponent: Shane Mosley. Both men are old and Shane is on the downside of his career after losing two of his last three and drawing in one. This would give Zavec more exposure in the US and also add a name fighter to his resume if he were to win. His chances are good seeing how Mosley is nothing like he was years ago, and is seemingly demoralized from his two losses.