Probably won't be AEW Champion soon: Pentagon Jr.

There are a lot of reasons that Pentagon Jr.'s star is on the rise, not just in AEW, but in all of pro wrestling.
For one, he's a traditional luchador through and through. Pentagon Jr. has never appeared without his mask (nor has his brother Rey Fenix) and he is a proud upholder of the masked wrestling dynasty.
For another, his in-ring skills are simply phenomenal. Pentagon Jr. is every bit as good as AJ Styles, Ricochet, or Kenny Omega. The only thing holding him back slightly is that English is his second language, and thus mike skills are almost a no go.
Pentagon Jr. was brought in for the AEW tag team division and is currently embroiled in a war with So Cal Uncensored for the AEW Tag Team Championships. Thus, it's unlikely he will be utilized as a single star any time soon.