I posted this a few weeks ago:
>Penta's canon lore involves his mask being cursed taking careers and injuring his wearers
>Penta canon lore involves him wearing Andrade's father mask (the OG Penta from 25 years ago)
>Andrade becomes a schizo trying to save Penta from the curse and trying to claim his father's mask
>Ends in a Hair vs Mask extreme rules match
>Andrade obviously loses finally putting the mask curse to rest
>Optional, Andrade wears back his mask with his old gimmick Andrade La Sombra 100 Almas (100 Souls Shadow) trying to collect souls for his own mask (The Shadow)

Another feud since he was pretty much confirmed to sign with WWE:
>Penta VS Octagon is a canon neverending rivalry where Octagon is always the winner
>Octagon also warns him about the curse limiting him
>Penta also warns that Octagon has a shoot curse that has never been brought up
>In canon Octagon has had a legal battle with the OG Octagon claiming many luchadors careers
>Penta finally win his forever bound fate to Octagon in an extreme rules hell in a cell match (Penta's specialty)
>They could even bring the OG Pentagon in some form

Another one:
>OG Octagon's lawyers vs WWE lawyers wargames for the Octagon's name rights