What could have led to this scenario? Would the native Latin culture live on or would it be completely suppressed by the overwhelming Hellenism?
Maybe a longer living Alexander, who wants fulfill his conquest by annexing Carthage and Italy could do it? Even if his empire would eventually collapse and divide, Italy may be ruled by Hellenic or Hellene-friendly monarchs, what would lead to dominance of Greek culture and complex assimilation in upcoming centuries (a fate similar to what happened to Phrygians, Galatians etc.).
Maybe a longer living Alexander, who wants fulfill his conquest by annexing Carthage and Italy could do it? Even if his empire would eventually collapse and divide, Italy may be ruled by Hellenic or Hellene-friendly monarchs, what would lead to dominance of Greek culture and complex assimilation in upcoming centuries (a fate similar to what happened to Phrygians, Galatians etc.).