It has been dragging on for years. According to the quote below, it looks like we have to wait until at least April 2018 for a decision.

In January 31, 2016, the court ordered that discovery, the process of gathering evidence, must be completed by 1 March 2017, over a year from now. The court also ordered that expert discovery needs to be completed by 31 October 2017.

Other motions must be filed by 20 December 2017. A motion for class action certification must be filed by 1 March 2018; and Merck must file its opposition to class certification by 5 April 2018.

http://ahrp.org/former-merck-scientists-sue-merck-alleging-mmr-vaccine-efficacy-fraud/