I don't see Google allowing this to happen, they will try to offer lower prices/extras because they need to make up for lost time and market share to leaders AWS and Microsoft who are quickly pulling away as the 2 leaders in the market.
Google has enough resources to accommodate any medium/large enterprises that want to switch through price and onboarding incentives. Not to mention they employ many of the world's Kubernetes developers, experts, and maintainers.
The holy trinity has enough cash and willpower to keep a monopoly/monopolistic pricing from happening and there's enough business for them outside of the cloud to encourage them not to collude IMO.
Not to say hybrid cloud architectures are unnecessary - they most certainly are good, and the way the industry is moving, I just don't think there will be a huge pain point over monopolistic pricing/actions.