Oh, this takes me back! 'The Last Order' is actually part of Yukito Kishiro's sprawling 'Battle Angel Alita' universe. The original manga, 'Gunnm' (or 'Battle Angel Alita' in English), kicked things off, and 'The Last Order' serves as a direct sequel to it. But wait—there's more! After 'The Last Order,' Kishiro continued the story with 'Mars Chronicle,' which is the current sequel. So the order goes: 'Gunnm' → 'The Last Order' → 'Mars Chronicle.'
As for prequels, there isn't a formal one, but flashbacks and side stories in 'Mars Chronicle' dive deeper into Alita's past, almost feeling like prequel material. Kishiro loves expanding this cyberpunk world, so who knows? Maybe we'll get a dedicated prequel someday. For now, I'm just hyped to see where 'Mars Chronicle' takes us next!