Under any circumstances, the El Clasico match will continue to be interesting, because the rivalry between these two teams has been around for a long time. A hot atmosphere is always presented when they face each other and in this match they will show the same thing. Moreover, with Barcelona's opportunities still open, they will try their best to win.
Barcelona's opportunities for winning La Liga still open yet, if can make reduce 5 points remaining by defeating Real Madrid on game week 32 and wish on 6 matches left Madrid loss their points. All possibility is open with Madrid or Barcelona will be the La Liga winner candidate in this season although Madrid has large percentage become the winner.
Not just in La Liga but regardless of this league, the match between Real Madrid and Barcelona is very well known for all over the world and this is important for both teams to win this match, regardless of the result they get in La Liga or the Champions League, winning the El Clasico match is a great achievement, however, they usually say El Clasico is just a normal match to decrease the pressure on their players but I don't think if that's right.
For Barcelona, this going to be harder than El Clasico because they should play against PSG. Also, Real Madrid will play against Manchester City which is another hard game for Real Madrid and this can make the El Clasico match harder for both teams the schedule of the games.