I want to know the answer to the following question:
What rival league did the Spokane Shock join?
All the background I'm provided with is that "On September 1, 2015, the Spokane Shock officially left the AFL and joined the IFL under the new name Spokane Empire, becoming the fifth active AFL/af2 franchise to leave for the IFL since bankruptcy (Iowa Barnstormers, Tri-Cities Fever, Green Bay Blizzard and Arkansas Twisters—now the Texas Revolution—left previously).". Is that enough to answer the question?
Answer: yes