Real Madrid is playing very well this season and they were also able to bring in new players when they out of a sudden had to deal with injuries. Both Courtois and Vinicius Junior are key players ad while they found a great solution for Courtois, which was hard enough, it was difficult to do the same for Vinicius Junior when he was injured. But he is back and living up to his full potential. Barcelona won't get close to them, but to put it in a nutshell whether there is still a chance for the title race to become close, it will all be about matchday 32. The clasico will decide whether there is going to be some fighting until the end.
Form always determines the success of any squad. Real Madrid is in good condition this season, and there is not much doubt that they will win the La Liga, since I do not believe Barcelona will be able to compete with them. Real Madrid is already eight points ahead of Barcelona, and they defeated Barcelona in the first leg. With Real Madrid's current form and the points gap they already have, I don't think the El Clasico will determine whether Barcelona can succeed or not, but they should be able to close the gap on Madrid due to their inconsistent play.