what is the generation number of the iPad pro 12.9" that's just annonced? Gen 5?

Hello,

This will be my first Apple product so i'm not too sure of the model versions.

I was looking at accessories for the new ipad pro that's just been annonced - some accessories state compatible with Gen 5 ipad pro.

Is the generation number of the iPad pro 12.9" that's just been annonced a Gen 5?

I know it's not availble yet but I want to make sure I know which accessories to order on the 30th so i'm ready to go.

thank you.