I know Real Batis performed quite well during this season, but I don't see the chance for them to beat Barcelona. Barcelona must have a bigger motivation to finish at 2nd place, they won't let Real Betis to get even 1 point. Although Barcelona was defeated several times against weak teams, but in the next remaining matches, they must already be evaluated for their previous mistakes. Especially, their current coach is Xavi Hernandez, he won't let Barcelona to miss any points again.
Winning the match from Real Betis is one of the things that Barcelona must do if they want to finish second in the standings at the end of the season. Having previously won the match against Mallorca, then Barcelona will most likely fulfill its desire to compete in the Champions League next season by maintaining its recent winning streak.
This season they have failed in all competitions especially regarding the title and it looks like Xavi will have to evaluate all his players for next season and start looking for some new players to strengthen the team and increase their title chances. I know they will have a way of doing it, but without good players they will also have a hard time reaching anything as their next target.