PSA: You shouldn't be going into Ranked after a champion release
You should be in normals practicing around how to play as/with that champion. If you decide to play ranked, even if you aren't playing the new champion, you are putting yourself at a disadvantage because you won't know how to appropriately play with them or against them.
Everyone shouldn't be playing ranked right now, and the queue should be disabled for a week or two so everyone can get a handle on what a new champion does, how it plays, and if there are any unique build paths or tricks you need to watch out for.
Enjoy your day.