I have a feeling its going to happen.
For those of you that don't know its an item coming in the preseason. 3000g for:
>+50 attack damage
>+15% life steal
>UNIQUE: +18 Lethality (11.2 − 18 (based on level) armor penetration)
>UNIQUE – UNQUENCHED: While near one or fewer visible enemy champions gain 50% − 120% (based on level) bonus attack speed, decaying over 3 >seconds if other enemy champions get too close.
Its 132.25% gold efficient at level 1, and 190.58% gold efficient at level 18, making it the single largest stat-stick in the game outside of the Mejai's item line. There's also very little risk to it, considering its still a 'fully functional' lethality item in teamfights, at 5-15% higher efficiency than the other items.
One thing to note is that the Lethality was set to 10 with the lethality set bonuses being added, but on their removal, the 8 missing lethality was noted to have been added to the UNQUENCHED passive, rather than its base stats. I am unsure if this has changed officially yet.
This also allows champions like Fiora to go for Titanic Hydra, rather than Ravenous Hydra. Expect champions that build Ravenous to end up a hell of a lot tankier and hurt a hell of a lot more at 3 items.