Without the community, bitcoin will fail. 100%, no doubt.
What happens when most nodes are corporate? Then consensus is just another corporate conspiracy, like the Injustice System, like the elections, like trade rules, like the CIA, etc.. We like to think that the incentives will keep people honest - but we're not honest with ourselves about what the incentives are. Specifically, maintaining the 21mil limit is incentivized for us plebs because mist of us don't use debt. The reason the corporations decided to have inflationary credit money in the first place was because they use "leverage"/debt to finance new operations before they could otherwise afford it. That's rational. Being able to access cheaper credit is a huuuuuuge advantage, and you would be insane not to use it. We're insane. I hate usury - but I'm not unaware of the reasons for usury. So inflation also makes because it shifts the "real" cost of debt to future consumers. Inflation is socialism, basically. And its rational, despite being objectively predatory and evil.
This won't change just because corporations get bitcoin. They'll just be looking to change consensus. They already are. The only thing that could prevent it is if there's a robust community of bitcoiners who are utterly intolerant to change. But communities need issues to rally around. Our issue is bitcoin. What will it be after we win? We can't just pack it up - then we lose the win.