That shouldnt be volibear though. Volibear should be the thousand pierced bear. He should look like a bear thats been through countless battles and won but not like some eldritch horror creature. Eldritch monster Volibear was more of what he looks like from the point of view of those wishes to subjugate which of course means he has to be as intimidating as possible. But normally Volibear is a warrior who thrives in battle and should also be kind of a dick. Which is shown when he fucks with Ornn and tries to bully him into building weapons for him.
As for the kit I think volibear has to keep his flip and roaring and if possible his regeneration in some way. Perhaps they could modernize those skills and do something else instead of his bite and ult.
So i guess the point to my rambling is that Volibear shouldnt be a champion whose primary thematic is to instill fear but more of a god of battle whose body is coursing with power and relics of those who have tested him.
Edit: the biggest change I want them to do to volibear is perhaps change his name from volibear to Voli or just Voliber. Make it so his name isnt just “ HEY HES A BEAR AND HE HAS BEAR IN HIS NAME.”