Next season there is no guarantee that the same thing will happen as this season, because Bayern Munich will definitely evaluate how to navigate the coming season.
I don't think it makes much sense to send a young football player like Bellingham off the team. He is currently signed to Real Madrid and will perhaps play for them for many years to come. I think Dortmund cannot make very logical decisions on such matters.
I don't know if they'll ever get an opportunity as big as this year's. Bayern made a lot of mistakes this year, but they may not be like that next year. They've been dominating the league for so many years and for the first time in a long time we thought they were going to lose the championship this year
The season before they insisted on keeping Haaland and indeed until the end of the contract there was no change and that actually cost them sales, they didn't want that anymore for Jude. The offer is big and the contract is running out but it's a shame something like this has to happen again and again and it's possible things like that won't change for Dortmund.
Now they still have to tie up one more young player who has good potential and progress. Moukoko is an interesting player for them now and my hope is that they keep this young player.