Here's my theory. Revan=Revenge/Retribution. This is all about Zayne's purpose in life. Revan studied under multiple masters. There's plenty of opportunity for Zayne too now. Revan gained power as he killed people Zayne's empathy would allow him that ability. Revan lead the first reaction against the Mandalorians Zayne was the first Jedi to strike back, blowing up a Mandalorian base. Revan was headstrong and arrogant That describes Zayne Carrick very well. Revan had a sense of humor Clearly, Zayne Carrick seems to like that. Carth seems to instantly trust the Revan onboard the Republic flagship---why not if he knows him from before? Think of it, who would be the last person you'd suspect to be the Dark Lord? Revan had the weird capacity to wander into bizarre situations left and right Ditto Zayne. There's plenty of time for Zayne to continue to bulk up as he wages his war against the mandalorians. Recall, it's not until several years after the destruction of the Cathar that Revan leads his crusade.