Except Ash has never been set up as the hero of the world
He's a kid on a journey
Winning a league is the perfect conclusion to his character - he lost his first league, remember? Bookendig with him winning a league is perfect
Hate to break it to you, but all those pokemon he caught and...
Ash won a league, so now's the best time to finally reboot everything and get a solid restart on everything
It's a pipe dream, but it'd be nice if nothing from the old series carried over and Ash got to experience everything without it trying to pander to nostalgia
Less than two months, actually, since Ash began his journey with two months to go until he turned eleven, so he's gone through seven regions and seven leagues in less than seven weeks
So of course now's when he wins a league