Yeah,Facebook already announced their crypto called Libra. Its just announced. It is a very big project so if its on ieo it will be on more than one exchange in my opinion. I am not sure about it. But in 2020 they are coming with it.
I don't think they will have to go through IEO since they have enough money as capital for this project.
We are talking of facebook here which is a billion dollar company and they are not launching a typical coin which we can invest like ETH and BTC, its a stable coin that they are in control of it,.. and that's the thing everyone should know, stable coin is different from BTC so they will not be mislead with facebook announcement about Libra.