Could he also consider going to a club with a slightly lesser status such as Chelsea to still play CL?
I guess, the best thing for cristiano Ronaldo to do now, is to resign to receive a beautiful honor from the world, and to look for a coaching job to raise more potential players that will make the world to celebrate him than looking for a club to join after the disgrace Manchester united coach gave to him by eliminated his contract. I don't think, Chelsea coach will allow someone that is above 28 age in their team, because cristiano Ronaldo is almost 38 age now, which it will be difficult for any team to accept such player in their team.
I think 38 is not a negative for Cristiano. We watched Zlatan again with his good performance at this age. Ronaldo can show this performance in the same way. It just takes a team that believes in it. He was 37 years old last year and had done well for Manchester United. Cristiano Ronaldo probably plans to play football until the age of 40. Later, he can step into his coaching career.
It may not be a negative, but Ibrahimovic wasn't there because of his amazing goal scoring or just his talents, dude was there as a leader of the team, Ronaldo lost that with his latest United period. He didn't looked like a leader, he looked like a guy who wanted stats more than anything else and last year he played amazingly, dude even had a few hattricks.
So, it is easy to say he is not that terrible now neither, but he doesn't look like a good locker room guy and that could be an issue. Plus any great team that is fighting for UCL title would want someone with less media attention around him, and that is why it's not an easy task. I think it would be better for him to go outside of Europe for a while and then retire, or at least go back to his origins, to Lisbon if I am not wrong and just play there.