No comment about Dortmund from me for obvious reasons
however, has Bayern released an official statement?
Either way, they may be taking the pragmatic approach of waiting a year or two before formally joining unless they go the qualifying route
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Also, BuLi cannot be compared to other leagues like Serie A and La Liga. Both of which are highly toxic. Serie A compounds it with its pre-war mentality, bureaucracy, pettiness, and lack of desire to modernize let alone innovate. Instead Italy kicks, maims Juventus who are the primary reason the league sees any revenue for sharing. Completely different story in BuLi imo.