Darkin Vi Theory?!
In case you don't know, the Darkin, such as Aatrox and the recent one Rhaast, were basically imprisoned in weapons (correct me if I'm wrong but I think that's it). Varus' bow is also a Darkin btw. The way the Darkin (weapons) manage to take their real form is by overtaking/killing their wielder. That happened with Aatrox, who apparently killed his wielder and Rhaast, depending on what you choose during the match, also kills Kayn to assume his final form just like Aatrox. Varus's bow still hasn't done that.
Then I noticed a while back when Demon Vi was released that she looks kinda similar to Aatrox (a Darkin) and so do her gauntlets (specially her gauntlets).
So maybe (in the timeline Demon Vi exists?) Vi somehow found those Darkin Gauntlets and used them until the Darkin within them finally overtook her or partially overtook her (she doesn't reaally look like a full blown Darkin).
It would be cool to get Darkin themed skins if we're not gonna get a lot of Darkin champions. We already have Void champions and Void skins so it wouldn't be that crazy to add Darkin Demon Vi to "the Darkin cannon" and make more Darkin themed skins...
What do you think? XD