>>89877448>or Jackie telling Marco that?
My guess is the opposite of this and it's Marco telling Jackie that.
If the whole "Marco is more mature" theme holds true, then he'll see that Jackie was a crush but not much more beyond that. He may even see her differently after the 16 years in another dimension. Jackie would be ok with it because she's cool like that. Thus opening the way for another shipping war with Starcofags rekindered with hope.
Jarcofag here btw