It was an unexpected season where top clubs like Leverkusen, Liverpool, Milan or Roma went home without winning the title and instead it was an underdog team like Atalanta who managed to win the European League title for this season. I'm curious what will happen next season considering there will be new entrants coming from various parts of the European competition.
Of the four top teams that I mentioned, only Roma will return to the European league and the rest will compete on the bigger stage of the Champions League. Is it possible that the underdog team will surprise again next season? remembering that everything is possible after seeing Atalanta this season and of course we won't see Sevilla either because they were knocked out last season and in the domestic league they finished in the bottom position.

Anything can happen, because in the European League the team that is considered the underdog is more dominant, but they can be successful. Whether it's because there is no motivation from the top teams or what, what is clear is that we see it that way. This season shows the same thing, the teams you mentioned actually had to be eliminated early, even though they were the team that were previously favorites to become champions in the European League. However, Atalanta, with all their existing abilities, managed to emerge as champions.
It's interesting to talk about Sevilla in the European League, because they are the team that dominates the European League with the title they have won. However, this season we can't see them here, because this season it could be said that they have completely failed to provide anything good. They are in the Champions League, and in the Champions League they were so disappointing that they only finished last in the group standings.