The thing is, if they were going to run a conspiracy to hide the new gloves with fake photoshoots like that, why would they pick Arman for the con lol. Use the headliner Pereira. Who loves pulling pranks on people and would find it hilarious secretly trolling his followers like that.
I just think it's a lot more likely that they've just got a new concept design for the gloves that they'll unveil, but none actually ready yet for use. Dropping new gloves on fighters is a terrible idea when they're not used to them. You announce them and say trial samples will be sent around so that fighters could get used to them before they have to fight with them starting in a few cards. Not tell them the week of the fight that surprise they've got to use new gloves.