It is interesting that these two are coming to see Papa P and in fact it sounded as if Usutu was expecting to see him (precog obviously). So we also so he painted that Peter would lose his abilities. Clearly they didn't really know who was in the painting, but perhaps Usutu does. It is also interesting that Hiro has been learning more and more about his ability in recent episodes and using it in ways that deceive people (ie not killing Ando). He once said he wouldn't go back in time, but perhaps he has learned how to use it, or will learn, through the visions of Usutu.
So perhaps what we will have is the two of them working together to give Peter his abilities back.