2nd punic war

This alternate history is intended to be a combination of alternate history and hallucinatory images of impossible worlds. As such, it will not focus on detailing of traditional facts, but shall give its account through participants in history who might or might not have been real. It shall keep...

Let's say that after the Battle of Cannae, Philip V, the Antigonid King of Macedon, realizes that there is a fundamental opportunity in Italy he could easily utilize. Instead of focusing on his border states, or on petty battles, decides to fully commit to an alliance with Carthage or Hannibal...

I am very much aware that Hannibal used many Gallic mercenaries in his army IOTL, but just 7 years prior to his crossing of the Alps and the defeats he dealt to the Romans, a large Celtic coalition began gathering. While the tribes of Cisalpine Gaul had been mostly at peace with the Romans for...

What if the Romans had either a) Broken through the weak infantry in the center and killed/imprisoned Hannibal? b) The Roman generals realized Hannibal's pincer tactic and had made precautions to prevent it from working?