He's one of my favorite villains in Marvel and I'm a little sad that he got killed by the Punisher not sure if he's returned but I think a good way of bringing him back would be if maybe he was restored to life by his rings but revived a changed man and went on a path similar to his MCU counterpart. Like he finds love and lives happily for a time then loses his wife and grief drives him back to evil. I also like the idea of him having Gene Kahn for a son and for the dynamic to be him not wanting Gene to be part of his criminal activities or for Gene to be ignorant until something major happens and Gene ends up wanting to be like his dad or to please him and earn his respect. I could also see him taking over the 10 rings in the comics and running it in a more terrorist style way plotting attacks on western countries and such.