I know that many do not have a high opinion of Babic, but he is willing to fight and does not avoid anyone. Who could be his next opponent?
Someone like Kownacki would be a fun fight. Maybe Arreola if he wants a tough but washed out opponent. I don't think he can go above that level.
Pulev would totally derail the hypetrain. There's nothing to suggest that Pulev isn't still a top 10 HW, hell he might even still be a top 5 HW.
Even at the near end of his career Pulev is far too good for Babic. As another poster mentioned Kownacki and Arreola would make for entertaining fights and he probably he can't go much higher.
Its good he is fighting again. He is vrry entertaining. Who he fights? Well, at some point he needs to step it up.