Wouldn't 'Vi vil abonnere oss' also fit here?
That sounds wrong, 'abonnere' isn't a reflexive verb.
Isn't "abonnere" transitive, i.e. an object is required (abonnere på ...)?
What if you say "vi ville abonnere". That sounds more polite, doesn't it? That means that we would like to...
So, how would you say "we will subscribe" would it just be the same???
That would be: "Vi skal abonnere".