I don’t think Leia’s directly projecting Han’s image to Ben, I think it’s just in his head like they say. I just personally think it’s clear that Leia’s the trigger for the whole scene. I’m not great with words so I’m not sure if I’m describing this correctly! I am completely on board with all three of them playing a part in saving Ben and think it would be a touching way for the original trio to “reunite” altogether. If only Chewie had more scenes involving Ben.