Lewandowski is expected to return in a week from his injury. But for his full recovery he might need some more time maybe. If he returns on the speculated date then there are going to be only two days remaining for the El Clasico ahead. It is one of the most critical games of the season for Barcelona so they need each one of their best players.
If Lewandowski doesn't become good enough to be in the starting eleven then I assume we would see Felix playing in his position. I hope Xavi doesn't prefer Torres in the centre-forward position in that big game because it is meaningless. Felix is a natural striker while Torres is a natural winger.
Lewandowski will be happy to face Real Madrid this season because if he does not return before the el clasico, it will be very sad for him and the fans because the match between Real Madrid and Barcelona will be very tough for both teams and everyone will try their best to win the match but I think if Barcelona players are back before the games against Real Madrid, they will be more confident to defeat Madrid because they are in camp nou and some Real Madrid players have not yet returned from the injury, But I believe Ancelotti will try his hardest to win the match so that they can maintain their lead in the league table. However, the match cannot be predicted this season because each team is performing well in both the league and the Champions League. Xavi will try his hardest to win the match because they will have a greater advantage than Real Madrid, Felix is performing well and is very talented he will show the fans what he can do in the match against Real Madrid.
El Clasico matches are always difficult to predict, but every team playing at home probably has an advantage that can be exploited. Barcelona is playing at home, so they should be able to use their home advantage to win El Clasico. But there is no guarantee about who will win it, that's because the competition between the two teams is fierce.
Several of Barcelona's main players have not been convinced to appear in El Clasico, including Lewandowski, De Jong, Raphinha and Pedri. Real Madrid has superior squad depth if the 4 Barcelona players are declared absent, but Barcelona is a team that is also difficult to predict because their mentality is getting better.
Exactly, the El Classico cannot be predicted because any team can win because both of them are very good. Last season, Real Madrid defeated Barcelona at Camp Nou and Barcelona ravaged at Santiago with 4_0. I believe this season will be different because both of them are in good shape, except for the players you mentioned who will not recover in time for the match. I believe Madrid will defeat them, but I am confident that the players will recover in time because Xavi will not make any mistakes to lose match against Real madrid, If Madrid wins at Camp Nou, it will be very difficult for Barcelona to defeat them at home since they are in very excellent form this season They want to win the La Liga trophy this season, and it will be very easy for them if they defeat Barcelona in both the first and second legs of the league.