Coop Character Crossover?

Do you think there could be a character crossover feature, to where you would have a leveled up/customized character that you can bring into your friends game or vice versa? Kinda like when you do strikes in Destiny 2 and you have 2 completely separate and different built characters, but not exactly like that. I’m just trying to explain what I’m saying best I can. What are your thoughts if that were to be a feature? Any ideas on how that COULD work if it were a feature in coop campaign?

That would be cool. I hope there is the ability to customize our characters or at least let us bring our MP character over.