Is this skin what Tryndamere is supposed to become if he gets possessed by Aatrox (similarly to Kayn and Rhaast)? I've heard about this theory and I wanted to know if it was right, since Aatrox have a unique voice line directed to Tryndamere.
No, that is skin was released long before anything about Darkins and it was based on horror movies.
This skin was released way before aatrox was released. So not related
Overall the skin was made before the darkin were even a thing.
However I imagine that once Tryndamere gets a VGU,they might rework it into actually being Tryndamere getting consumed by Aatrox.
aatrox mentions tryn because he is the antagonist in tryns lore.
