In 1141-3 Zengi was being squeezed on 3 sides; Sultan Mas'ud was demanding his submission, Johnny K was on the verge of conquering Antioch and Eddessa and last and least the KoJ formed an alliance with the atabeg of Damascus. In the event Zengi submitted to the Sultan complete with cash and his son as a hostage before the Sultan invaded the territory of Mosul. Johhny K died in April 1143 in Cicilia, just before his campaign against Antioch.
So WI Johnny K didn't die and the Sultan invaded Mosul after all? Would Zengi, and his dynasty including Saladin, have just been another minor nobody in the region? How would this have affected Outremer, the 2nd Crusade and Byzantium?