Saturday's AEW Collision will include Kazuchika Okada versus Ultimo Guerrero. The match was said not to go well.
AEW promoted Ultimo Guerrero under his masked identity. Ultimo Guerrero has not been a masked wrestler in 10 years come this September, though he was masked when AEW CEO Tony Khan was watching CMLL. Khan's interview style is like lucha libre, where he repeats not moves but full sequences, and so I think I've heard/read some of the same greatest bits many many times.
His go to story about CMLL is talking about watching Ultimo Guerrero, Rey Bucanero, Tarzan Boy and many others in the early 2000s – about the same time I started doing the same – and explaining that fandom to the various Mexican wrestlers who come to CMLL. As he has so warm memories of that time, that was my guess as why AEW asked Ultimo Guerrero to wrestle masked. Another theory is someone in AEW just grabbed the wrong Ultimo Guerrero graphic and, once he was shown as a masked man on Dynamite, AEW felt like they had to present him that way.
FantasticaMania viewers know Ultimo Guerrero wrestling masked is usually not an issue – as best I know –
Ultimo Guerrero was not aware he was going to be asked to wrestle masked and did not bring one with him. That led to a mad scramble to find a mask or mask up a mask, and Ultimo Guerrero ended up wearing a mask that wasn't really suitable and would not stay on his head. It appeared Guerrero tried to cut out a lot of spots that would've risked his mask coming off, which resulted in a lower quality match – and the mask still came off multiple times during the match. The match was not what Guerrero and Okada are capable of doing, and even editing around the mask issues probably won't work.