There hasn't been any "new" teams added to the squad in a long time, so adding Russel for that team would be a great addition.
As far as I know Cadillac is in talks with 3 drivers currently:
•
Sergio Perez•
Valtteri Bottas•
Mick SchumacherPerez is already about to sign for them. They are expected to announce him after the Hungarian GP. His teammate is unknown for now. They say it's gonna be Bottas or Mick.
Truthfully if I were in their place to pick one of these names, I'd choose Mick. I don't think they should sign 2 old drivers. It'd be better to have one young driver.
