I guess that there maybe one team that surprisingly wins the Bundesliga title, perhaps RB Leipzig or Bayer Leverkusen, but that would still not change that much for the league as a whole. I mean if Bayern Munich does not win the title for one year, it just means they will win it again one year later. It would still be miles away from having a seriously competitive group in the Bundesliga like they have in the Premier League or also in Italy where it would be impossible to predict the title winner for the next five years. Whereas in the Bundesliga I would say that at least 4 out 5 times Bayern Munich will win it. Their advantage is too big.
Well I've thought about this same thing, and the both teams you mentioned are currently performing well and are the only teams that's given Bayern Munich a tough time this season, one even won against them in a cup final before the season started, well Bayern Munich are still very strong contenders and the league is still fresh so there a possibility that they could attain the top place before the winter transfer window and even if they don't attain that before then, they’ll still manage to secure the trophy like they did last season I'm the final week of the tournament.
Well the Premier league is no doubt very competitive and I believe it's the most competitive league in the world currently, however I'm beginning to see a difference in the Bundesliga cause smaller clubs are now developing well and beginning to challenge Bayern Munich like Leipzig and Leverkusen are doing currently, they even almost lost the league to Dortmund last season and sooner the competition would get more tougher.