I guess I'm the only one who thinks BC could end with less than 25 volumes because how ridiculously fast everything is going.
Take the current fight between Chronos and Licht for example. They just told everyone who the real traitor was and now he is fighting the Magic Emperor.
- If Chronos dies the title of Magic Emperor will be open and Asta/Yuno could take it, because plot.
- If Licht dies the main antagonist of the manga is gone.
- Right now the captain of the Golden Dawn is gone either way (the guy who looked like Berserk's Griffith was the traitor, how shocking) and Yuno will become the next captain, because everyone else in that guild is literal fodder.
- If none of them die and Licht escapes he won't have anywhere to return to, because the Fire Lion captain is destroying his floating castle.
- If Licht wins and gets the Magic Stones (Infinity Stones didn't sound cool enough, huh) he can erase all of humanity.
You could speculate which scenario comes true, but this is BC and the most cliche one will come true so Yuno is gonna become the next Golden Dawn captain, Chronos will die to protect the kingdom, Yuno and Asta will be one big step closer to their dream of becoming Magic Emperor, and after that there will be nothing left than to defeat Licht and save the world from the evil elves.
Doesn't sound like something that could go on for over 30 volumes without going 4 times slower than the anime.