The official collaboration website can be found here and it seems that you can pre-register there to receive additional rewards when the collaboration will hit the Global servers.
And if you want to see the video that shows the skins - yes, this collab gives us skins, not new characters - go here.
That's honestly the biggest surprise. Instead of getting new characters as it usually goes with collaborations, Counter Side x hololive collab will add 5 new skins to the game that will allow you to give your current characters a new look!
Here's the list of the skins and which character gets them:
Lucretia - Mori Calliope
Awakened Yuna - Takanashi Kiara
Edel Meitner - Ninomae Ina'nis
Kaci Bins - Gawr Gura
Yang Harim - Watson Amelia
We currently have no information about how you will be able to obtain the skins, but we can assume most of them will be locked behind a paywall.
At least our Blue and Black tickets are safe!