Not so fast. Four former employees of Hyperloop One, which is trying to build a speed-of-sound train network, allege that the company is being mismanaged and is rife with nepotism. One of its founders is among those bringing the lawsuit: Brogan Bam. Brogan says he and three others were forced to leave the company, which has raised more than $100 million, after raising objections. Hyperloop’s lawyers are dismissing the group as remnants of a failed “coup,” but the allegations could chill international investors on the project.