there’s no rule that says a movie has to adhere to anything EU-related
Well, technically there is. (To a certain degree anyway).
More a guideline than actual rule.
True. All I meant is that they can’t contradict it. And of course Saw Gerrera in RO was an EU character. And there’s going to be a few of them in Solo as well.
Clone Wars has always been canon. Pretty sure Saw was actually a George creation, Saw was supposedly supposed to turn up in the cancelled live action series Underworld.
A better example would be Quinlan Vos and the Black Sun appearing in Clone Wars.