Barcelona are my favorites to win this competition. They did not have any major player who left their team and they improved their squad.
After watching the first matches from the big three teams I don't see how Atletico Madrid and Real Madrid will challenge Barcelona for the title this year, although it is early to tell but I don't think Barcelona will have any problems.
Barcelona are the better teams on paper, their odds of winning is very low compared to their odds of losing, this shows a very good illustration of what the outcome of the game will be. Football can be unpredictable but the unpredictability can only happen during the match and not before the game is played. Barcelona is the favorable team in this match and I think they’re going to play a fantastic game to win the match without any troubles.
Edit: Levante just took the early lead now in the 15th minutes of the game. The game is just getting started, we may see a comeback soon from Barcelona because they won’t allow Levante to score pass them for too long and not score an equaliser.