Plaintiffs’ attorneys are setting up for a battle in Delaware federal court over lead counsel status in derivative litigation challenging Tesla Inc.’s $2.6 billion bid to acquire an allegedly failing solar energy system installer SolarCity Corp.

On May 4, attorneys from Grant & Eisenhofer, Kessler Topaz Meltzer & Check and Robbins Geller Rudman & Dowd moved to consolidate and appoint co-lead counsel in two cases in the U.S. District Court for the District of Delaware, each accusing Tesla CEO Elon Musk and Tesla’s officers of overpaying for the firm in a conflicted deal that would allegedly benefit Musk and his family members.