@Docnaster I feel that Manchester United shall win it, because they know that finishing in top 4 will be very difficult hence winning the Europa league is their best bet to seal their champions league spot for the next season. Furthermore Arsenal will be more focused on their premier league campaign, thus theyre ruled out and as for Barcelona I feel that they dont consider winning this competition important therefore I dont see them as a genuine contender for winning this competition.
No no no no no...you got it all wrong. See it from this aspect.
1. Barcelona went to Europa last season and crashed out, this season, thru must not crash out shamefully again.
2. Apart from Arsenal and Manchester City, Manchester United is the next strong club contending for the EPL title. So they will end in top 4.
3. Arsenal is interested in Europa League and that is why they were playing their best players even when they already qualified.