It is too early to conclude that Juventus will win the Europa League, you know it is just of recent Juventus started performing well, unlike Manchester United that have been performing well for a longtime. I'm not under rating Juventus, but let's check at the record of Manchester United, their strength and quality, I think they have a better chances of winning the europa league than Juventus. The strength of Manchester United squad is good enough to maintain the top four position in the premier league and also to fight for the championship of the Europa league. At the days of the season count Manchester United keeps improving.
Manchester United and Juventus are among the two best teams to win the Europa League this season, but using one team's performance in the league as the possibility of winning the league over the other team is not a guarantee that that team will win the league title. Arsenal was doing well in the Premier League, remaining at the top of the standings, but they were eliminated from the Europa League. So, for the time being, we cannot predict or guarantee who will win the Europa League.