The romance between Kelly McGillis’ Charlie and Tom Cruise’s Maverick was a big part of the first film, and when Top Gun ended, you presumed that they would be together.
There is no guarantee that the role Jennifer Connelly is that of a love interest for Maverick, but presuming it is, that would seem to indicate that Kelly McGillis will not be in the film, and that Charlie and Maverick didn’t wind up together after all.
Just given the description of the character and her being the female lead, one has to assume that she will probably be the love interest for Tom Cruise’s Maverick.
This naturally begs the question, what about Charlotte Blackwood?