~Snip~
Yes that is right Bayern Leverkusen long undefeated streak shows how strong and determined they are. Even though they lost in final but it is clear that they are good team. And exactly hey can play well against tough opponents and have good chance of doing well in Champions League. Champions League has many strong teams but Leverkusen has already shown they can compete with the best in the Bundesliga. They might not win first place but I think they'll come close and do well in the competition. Their team work can help to stand against the tough teams and they already showed it.
I hope Leverkusen can achieve more than they have won this season, defeat in the Europa League Final disappointed everyone involved in Leverkusen. Due to a small mistake when facing Atalanta, they failed to win the first Treble Winner in its history. Next season Leverkusen will play in the Champions League, they must be better prepared and need to develop their strength to face bigger challenges. They may be able to maintain their dominance in the Bundesliga, but there is no guarantee of success in the Champions League because the level of competition there is more competitive than in any other tournament.
Of course, the level in the Champions League is more difficult than the level in the European league. I don't think they will continue this undefeated in the Champions League. Strong teams like Manchester City and Real Madrid would probably beat Leverkusen in the groups. It was a great year for Leverkusen, but they lost to Atalanta in the final. I wish they had won that match too, but they couldn't. I can't predict what will happen in UCL, it will be a very competitive year.