Rome survives. Offerings of thanksgiving plume their way up to the heavens, the endurance and fortitude of the citizens of Rome conquers (once again) the reckless move of a bold captain of antiquity.
What is there now left to fear?
Answer: A Greek bearing gifts!
Blatant Greek opportunism at its best or worst (delete as applicable). The ancient Greeks were never a united nation as we know it. Factional disputes and petty City State one-upmanship was always their downfall. So with the eastern borders aflame and crumbling to Seleucid expansion, for want of an effective army to counterbalance the Seleucid pike and shield, an adventurous general with such a force leads a fleet west, beaches itself in the lee of a friendly Italiot City State and marches unannounced and unopposed to the very Gates of Rome.
The citizens of Rome stare in disbelief at the advancing column. How can "The Fates" curse us so?
The walls of Rome as yet not repaired, the surviving citizen legions outnumbered 4:1 were but capable of a mere token resistance as the great city fell ingloriously to "Son of Phyrus" in a tame and feeble fashion. (Not even making it to a token tabletop game.)
As the wet clay hardens for this Greek scribe there has little of worth or note to add to affair. Rome is now under the protection of the Greeks while those Romans still bearing arms are now confined to a region in the north of the country. The Greek success can only be seen as a desperate gamble to grab the short-term wealth/plunder of Rome to fund the large mercenary army needed to successfully confront the Seleucid Empire.
Carthage too prospers as its influence and empire consolidates, its army intent to stay on in northern Italy and hunt down the last defiant Romans that remain. The western Mediterranean is now her lake and even the fierce Gallic/Germanic tribes pay her tribute.
Diplomats usher forth on secret missions as the powers of the east (Seleucid) and west (Carthage) exert great pressure on the diminished powers of the middle (Greece and Rome). One senses now is the time for careful or artful diplomacy.