If this is what we can expect from Serkis then my prediction for Gollum is that it will take the victimisation route like most modern Disney villain origin stories and be about a weird, ostracised River Person who is driven to throttling his bestie to death after being bullied by his peers and that he's just misunderstood - The Ring kept giving him the positive affirmation he so lacked in early life, is all.
It won't be a cautionary tale about how falling to temptation wrecks your relationships and your very being, it'll be about how one has no real control over their actions and anyone who tries to punish or stop you is the real villain and that the wider group is ultimately responsible for what you do because they didn't pre-emptively give you enough positive reinforcement in your childhood or any other excuse people reach for when they make bad decisions.