Narcotics Anonymous is a non-profit fellowship or society of men and women for whom drugs had become a major problem.
Jor-El (also known as Jor-L or Jordan Kent in the Golden Age) is a fictional character appearing in titles published by DC Comics. A Kryptonian, Jor-El is Superman's biological father, the husband of Lara, and a leading scientist on the planet Krypton before its destruction. He foresaw the planet's fate but was unable to convince his colleagues in time to save the inhabitants.
It's not about having the same named mothers. It's that Superman's mom is in danger the same way Batman's mom was, except a blow torch instead of a gun. Batman realizes he can save someone else's mom the way he couldn't save his own. He realizes that Superman isn't fighting him to stop him but to get his help to save his mom.