Source: https://twitter.com/WarcraftDevs/sta...42953883209729
We're not entirely sure how this rumor got started, but it's false - the 7.1.5 Legendary upgrades are not connected to the Illidan chain.
Many people were told there was absolutely no proof of this yet the sheep just couldn't control themselves. Please, unless you can verify something with your own two eyes stop feeding into this crap.
The same exact thing happened with "Oh no Kara will be gated behind an attunement!" rumor mill bullshit along with countless other things. Of course the tin foil hate society of the WoW community are going to claim it was a backdoor switch, but lord.