Nous croison tous les doigts pour que ce soit le cas

Bonjour Tom,

Yes, you are right. 'ça' (= contracted form of 'cela') could be used here. However, it is rather colloquial and often used in conversations. You can see it being used more and more in written context though (yet, still in a colloquial context). 

I hope this is helpful.  

Bonne journée !