Nah! I don't think that Lopez is really serious about that statement because he just became a star in super-light and achieve a difficult feat that not everybody can achieve. And now he's retiring? I don't really think so. I view it as a tactic so that he can have what he wanted but I doubt as well that he can get what he want as he's still starting to build his career from scratch. Too early for him to demand though.
I read in one caption on social media that he wants more if he wants to make a comeback maybe a bait for promoters to give what he wants because he totally dominated Taylor and won the undisputed title, but it's early to ask for that he is not yet fully established his name as a pound for pound fighter, there are other boxers who still has a claim for that title.
That's what him and his father wanted, and I do agree that it might be a bait for promoters after his contract with Top Rank. But if they are asking for too much money then I doubt that promoters are going to bite on it. He even doesn't crack the pound for pound list. Although he is a great boxer, but still his level might not be that elite for now.
We will see, now that Regis Prograis has won and defended his belt and calling for him. Maybe in the next coming months he might come out of his retirement and have a unification fight with Prograis.