He would've sided with the Persicos during the war. Contrary to popular belief, his father did not support the Orena faction.

As much as I hate to admit it, he probably would've become acting boss at some point. Both Junior and Allie Boy liked him and trusted him. He also had the backing of his dad. I don't think he would've been a popular boss, but the problem with the Colombos is that they really don't have many people to choose from. It's a sad and almost laughable group.