The future of $69 billion Uber is in flux with even CEO Travis Kalanick's final fate unknown

It's been one crisis after the other for Uber, calling into question the future of the $69 billion startup like never before.

And now it's all coming to a head.

On Tuesday, Uber is expected to release to employees the results of an intensive months-long study into its corporate culture. The report is expected to include recommendations for how the company should address its problems.

We don't know yet exactly what will be in the report. One of the biggest questions to be answered is what will happen to CEO Travis Kalanick; he's reportedly considering a leave of absence.

Even ahead of the report's release, Uber has already made some big changes. Emil Michael, Kalanick's right-hand man and chief fundraiser, resigned Monday. And last week Uber fired more than 20 people after a separate investigation looked into 215 complaints of sexual harassment, discrimination, and other bad behavior at the company.

Uber's board has committed, unanimously, to following the recommendations of the report, whatever those turn out to be. Depending on those recommendations, the most valuable tech startup on Tuesday could have a totally new executive team or it could look like it's protecting the status quo. Either way, the company's response to the report could go a long way toward determining its future.

Here's how Uber got to this precarious point and what's at stake now: