I want to know the answer to the following question:
What was the first film Schwarzenegger co-starred in with Sylvester Stallone?
All the background I'm provided with is that "He starred in the fifth Terminator movie Terminator Genisys in 2015 and will reprise his role as Conan the Barbarian in The Legend of Conan.". Is that enough to answer the question?
Answer: no