A Delaware Court of Chancery judge on Wednesday ordered a brief standstill in CBS Corp.’s lawsuit against Shari Redstone, but promised a decision on the merits of the case Thursday, just ahead of a planned board meeting at which the voting power of the company’s controlling shareholder may be diluted.

Chancellor Andre G. Bouchard’s limited ruling prevented the parties, for the time being, from taking further action in the high-stakes legal battle, which has quickly gained momentum since it was filed on Monday morning.