First of all, congratulations. Well done - beating their MSJ is essentially a win for you.
coltfan is giving you good insight. Basically, now, the JDB has to proceed to a real trial, with witnesses, evidence, etc. Although it does happen, more often than not if they cannot win on the SJ motion, you're in the driver's seat.
You can now open the floodgates so to speak with discovery requests if you want; or, alternatively, you can sit back and do nothing. The burden is on the plaintiff to move the case forward. Either way is ok, whatever you think is the best strategy.
Since SJ has been denied, they're are not going to be anxious about litigating this.
Congratulations for not letting yourself get railroaded.