No surprise:  Download memorandum_opinion1.pdf.  The penultimate line says it all: 

In this case, considering that the New York court has scheduled an expedited preliminary injunction hearing, the issues presented involve application of established precedents of Delaware corporate law to an unusual set of facts, which is unlikely to recur, and the persuasive practical reasons against embarking unnecessarily on a collision course with our sister court in New York in these extraordinary circumstances, I find Defendants have shown that failing to stay this action would result in overwhelming hardship.