Football can be unpredictable, but with Al Nassr's current squad, I'd confidently bet on them against any team in Saudi league. Star players really matter in a team, which is why Al Nassr strengthened their squad with these top players. I'm sure they'll do their best to bring out the quality they have to help this team.
All the top teams in the Saudi league have star players mixed with their squad, but none compare to the star players Al Nassr has this season. These top clubs didn't sign these players just to make their team names popular, like they did in previous seasons. This time, the signings of these star players are for real competition.
You're right that Al Nasr has several new players this season, all of whom come from major European teams. So, considering that, there's no doubt that Al Nasr's current performance should be much better than last season. The current Al Nasr squad is indeed filled with great players from major European teams. However, in my opinion, having many star players alone doesn't necessarily guarantee a team's success. Besides having great players, a team also needs a balanced squad and good teamwork.
Without those qualities, I'm sure they won't perform well in the competitions they participate in. Al Nasr must also realize this. They shouldn't spend a lot of money on expensive players who don't deliver good results. The point is, Al Nasr must be precise in bringing in new players, and avoid buying the wrong players. What the player means here is that Al Nasr must know which line has weaknesses, only then can Al Nasr buy new, better players to replace their own. That's the gist of it.