Reason why people are thinking that Barcelona and Arsenal have chance of winning the europa league it because they have good squad that are very consistent. Arsenal is leading in the EPL and Barcelona is leading in laliga , this makes people believe this two teams have the chance to be at the top of europa.
I agree about this, but the difference is that this is the European League, which we know that it is rare for big clubs to maximize their chances of becoming champions here. I'm starting to think if it's not that big clubs are interested in winning the Europa League? We can see that in the list of Europa League winners in the last few seasons. In fact, at the same time the European League is also always followed by big clubs.
If they are serious about competing in the Europa League this season, I can say that Arsenal, Barcelona and Manchester United could be the favorites (Manchester United and Barcelona must beat each other in the Play Offs first). But if they are too serious about winning trophies here, maybe they will be eliminated quickly.