The executive chairman of Nikola Corp. is under siege from skeptics of the company he started in 2014.

It’s forecasting zero revenue for 2020 and its first $1 billion year won’t be until 2023.

"Following this deal, NCL will turn into a joint venture between Worthington and Nitin Fire," the company said in a statement.

A bankruptcy filing could come within days, perhaps around Monday, which had been the government deadline for GM to reorganize. GM's all-ti...