Even without Bellingham this season, Dortmund strength is still enough to be taken into account by their opponents in the Champions League. I will not miss the games they play especially Dortmund fill in Group F which is very interesting to watch every game they play.
Haller is the spearhead of Dortmund this season. I hope he can contribute many goals in the Champions League match. Karim Adeyemi is still very young and I'm sure he will find his golden age this season. However, Dotmund's performance in the Bundesliga seems less than perfect at the start of this season. But I believe they are candidates in the top 4 until the end of the season.
I don't know if the same thing will occur this season; if care is not taken, the team might not even end in the top four this season.They always sold their players every year without replacing them with someone better; however, each player they sold after leaving the team went on to become a star at other club. As examples, consider Jude Bellingham, who only scored 8 goals for the team last season but is now doing well for Real Madrid with 5 goals in 5 games. Haaland also became a star after leaving the club. Some even claim that because Haaland knows the league he joined, he cannot be a striker for more than one season, and we now have evidence that he can. We'll see if Sabitzer or Haller can score for the team to go to the next round despite Borussia Dortmund's performance.