I've always thought it was a bit strange how in their past they both had similar powers and grew up in the same area even knew each other since they were kids(assuming what I've read online is true). Yet they weren't related so would you be okay if they ret-coned some of their history like made it so Wolverine and Sabertooth met when they were much older like in Wolverine's days as a government operative and make Sabertooth's hatred of Wolverine more understandable like have it that Wolverine did something bad that caused Sabertooth to go nuts. Kind of like Slade Wilson and Oliver Queen from Arrow. Mind you I'm not suggesting Sabertooth be humanized rather I'm suggesting he be fleshed out a bit more and in a way justify his hatred of Logan and would allow his crimes against Logan to reach to depths. Here's an example.