When the office-share startup WeWork's IPO got postponed, its biggest investor, SoftBank, looked for ways to replace CEO Adam Neumann because of his questionable behavior.

Vision Fund, a subsidiary of SoftBank, invests in growth-stage leading companies and is not only WeWork's biggest investor, but WeWork is also one of the Japanese group's biggest investments.

WeWork came to the limelight because of the events surrounding its planned IPO (initial public offering).

One of the reasons for such attention is when investors pushed back because of the widening losses of the We Company, WeWork's parent company.

Because of this, SoftBank put in an additional $4 billion at $47 billion valuations in January while its $4.4 billion stakes in the We Company in 2017 was valued at about $20 billion.

However, the stock market valuation of the IPO earlier this month amounted to a disappointing $10 billion.

Such news came amid reports of Neumann's drug use that included the questionable cashing out of $700 million and also allegedly owning stakes in the company rents, a potential source of a conflict of interest.

An insider said that even the directors on the We Company's seven-member board are also reaching the same plan of replacing Neumann as CEO with Benchmark Capital, another big investor of the company, also wanting him to step down.

This isn't easily done.

Though he had said that he was "humbled" by the IPO delay, since Neumann is the co-founder of the We Company, he has special voting shares that can make him dismiss directors.

However, SoftBank could also decide to use their ace and not back the IPO or give more funds.

Though there are no talks yet of what Neumann's future in the company could be, one of them could be Neumann becoming an interim CEO while investors are looking for his replacement.

This position will let him stay in the company that became one of America's most valuable startups.

His leadership could still be used as the company push for an IPO and help bring the funding the We Company needs to keep up its growth.

Neumann's possibility of getting forced out isn't going to be the first though staying in the company as an interim CEO is a lot better than what ride-hailing Uber's Travis Kalanick suffered when he was forced out by his board in 2017 after he got criticized for the chauvinistic and toxic work culture.

Uber, then, went IPO with a new chief executive.

In a gathering of executives backed by SoftBank held in Pasadena, California last week, Neumann didn't attend.

According to sources, SoftBank's chief executive, Masayoshi Son, is now in favor of relieving Neumann of his post.