The Club World Cup is now behind us. There's little point in discussing it. Therefore, Paris Saint-Germain needs to focus on winning the French league and competing for a second consecutive Champions League title. They need to focus on this and prepare their players for it. That final against Chelsea is now behind them. First and foremost, they have a Super Cup match ahead of them. If they put in a good performance in the friendly matches, they'll likely win it.
PSG can win next season easily even without any preparation. They're the only team with most expensive squad in French league. I don't wanna talk about their quality because that's obvious they 100% a winner next season.
I can't even name a club that can compete with them next season. It's because we have no other oil club than PSG.

Your confidence in PSG is high but you shouldn't be sure yet because injuries can change the performance of a team and make their squad weak which their opponent the teams you have already underestimated can take advantage to stop them from defeating them and winning the league next season. PSG is the richest club in the league and the are in good form no doubt but we have seen teams like Leicester City coming from nowhere to win the English Premier League likewise Bayer Leverkusen winning the league ahead of Bayern Munich when they had issues in their form.
If this were a competition for the Ligue 1 trophy, I'd be pretty confident that PSG would easily dominate Ligue 1 again.
But if it were other competitions like the Champions League, I doubt it.
Because every season, there are always clubs that consistently improve and know each other's weaknesses. This doesn't mean PSG doesn't have weaknesses, but other big clubs will certainly know what to do to eliminate PSG.
So, it's not just injuries that could be a problem for PSG, but weaknesses that other clubs know could become a major issue later.
True Chelsea has already shown that PSG can be beaten as they showed the weakness of this PSG side so going This this season it will be hard for PSG to still maintain top form because other teams has known and studied the way that PSG played their game and will definitely look for a way to break them down