If we are talking about Atletico Madrid's chance to win a Champions League title, then I don't think it will happen in the near future.

While Real Madrid is getting Mbappe and there is a Manchester City fact too, it is really not easy to reach the title. Besides Atletico Madrid's lowest expectation in this tournament isn't winning the title. Even a quarter finals qualification is seen as good achievement.
The board are really contented with the way Simeone is managing the team. They even extended his contract not much time ago. Would he like to achieve a Champions League title? Who wouldn't?

But Atletico Madrid need to make a huge improvement to reach even the finale once again (The last time they did it was the 2015/2016 season).
It won’t happen anytime so because even last season I did not count them among those that will win the champions league, and they are not different from other clubs that are not serious, the only people I see are not more than Manchester city Real Madrid, those are the potential winners of the champions league that I know for now because we won the premier league and the champions league all together before this season that just ended, Real Madrid did the same the thing by also winning but the la Liga and the champions league so it is a very rare thing to do but they still accomplished so with all this do you still think that Atletico Madrid Have a Chance to win the champions league. If Atletico Madrid continue to have the mindset of even if they don’t make it to the finals they have archived something instead of doing everything at all cost to also become the champions and they are busy limiting their self. With such comment they won’t go far because they don’t look like people that have the intention of winning the champions league. If they want to make it to the finals then they have serious work to do on their self.