There is no perfect candidate right now so they will have to choose wisely. The only candidate I think majority would approve is Klopp. However, we all know that he won't come next summer. He said that he is taking a year off so why is he even in the poll? All the others have some kind of a flaw.
De Zerbi - never coached a big team and never won anything
Motta - same as De Zerbi
Arteta - never won anything
Alonso - the best candidate out of this young ones. However, he is Madridista and probably Lpool bounded
Michel - one season wonder for now
Flick - had only one and a half good season in his life and he is 58y old German who was an assistant manager for majority of his career.
Alguacil - never coached anyone except Sociedad and only has won one Copa.
Conceicao - to be fair no one knows anything about him or his coaching style
It's not like anyone out of this names is a certain bet but if we need to bet it's better to bet on the younger managers than 58y old Flick who spent majority of his career as an assistant manager. Furthermore, he has never developed a player and has prepared only ONE entire season as a manager. That season he lost CL 1/4 against PSG who were swept 4-1 by CIty in the next round. Moreover, that CL he won was the strangest one ever. Due to the Covid situation all games from 1/4 were played in a single leg format behind closed doors. People seriously need to stop with that weird Flick obsession. If half or one good season is a criterion to became a Barca manager than we can also consider Roberto Di Matteo.