Crisis-hit Brisbane Roar are about to be plunged into more drama with sacked championship-winning coach Mike Mulvey set to commence legal proceedings over the club's failure to pay out the rest of his three-year contract.

Mulvey – touted as a leading contender for the vacant Newcastle Jets position – was surprisingly axed just six weeks into the last A-League season, despite taking the Roar to their third championship in four years.

Former Brisbane Roar coach Mike Mulvey is set to sue the club.

The news couldn't come at a worse time for the embattled club owners, the Indonesian-based Bakrie Group, who have announced they will appoint a new chairman, board members and chief executive in the coming weeks. Ex-Socceroo John Aloisi was hastily announced - after rumours broke on social media - as the new coach on Tuesday.

The club lost an estimated $2.25 million during the 2014-15 campaign and are reported to be hundreds of thousands of dollars in debt. The Bakrie Group are desperate to find new owners and have even promised to slash spending to make the club a more desirable asset.