Well, 'tiny side maps' were my first idea, but the simple portal-portals (one side to the other) was a small idea that, although came to mind, quickly slipped away. Regardless, both ideas would work nicely, I think. Adding the side maps would work for actual duel areas, maybe recreating the Sith temple from Malachor (already closed up), and the Imperial fuel tanks (where Kanan died - nothing really fancy, just a bunch of spherical platforms surrounded by a box-like area simulating fences, doesn't even have to be scaled realistically); other portals could lead to the Academy main hall, or to some other fan favorite recreation; or just small box rooms, each with its own theme (Yavin, Korriban, with windows, without windows, indoors, outdoors, etc.). Also, those constelations have potential to add some easter eggs