Asteriks said:
Are you guys sure about that?
At the moment Byakuran literally rules the world(s) of future, was responsible for deaths of almost all Arcobaleno, and has the power to "cross dimensions" in some way.
He effortlessly defeated future Mukuro, and one of his subordinates actually takes bath in melting lava.
And if you didn't noticed, currently, manga is quite fast, so this could really be the end of story.
What can be more ultimate from Byakuran in manga which started as lighthearted comedy with assasin baby giving lecture to new mafia boss?
You know how incomplete the story would be if they were to defeat Byakuran now? Of course, they can continue through this long, story with Byakuran as the main opponent of the entire series.
Yeah, the stakes and standards are ALOT bigger. And when they return back to the past, the Vongola is going to be mad powerful.
And if YOU didn't notice, manga seem have to time skips. So there's a possibility, we would be able to see the Vongola as adults. But we don't really know until we read.