The Kanto Giants are returning for the 'Replay: GO Bigger' Max Battle event in Pokémon GO. The event appears to feature the return of Gigantamax Kanto Pokémon, including starters and other iconic Pokémon. Details on specific Pokémon, such as Gigantamax Pikachu and Eternamax Eternatus, and how to battle them are available, suggesting a range of challenges for players.