PSG is a strong team but because this is the Champions League we certainly know that not many teams can defend the trophy in a row. This is a different competition from any other competition, maybe in Domestic PSG is used to doing it many times but in UCL I am not sure, because the title fight is not just about performance but many factors that each team must have. The first trophy is good enough to motivate PSG to stay focused but that does not mean they underestimate other teams who are preparing for the UCL next season.
Psg no doubt is a team to beat in next year champions league,but i dont see them winning the title next season, they might not be too lucky to win it next season again, they are not Real madrid, is only real madrid that can win it back to back. I see Real madrid winning it next season, they were not in good shape at the knock out stage this season, next season Real madrid will turnout well in the league.