I've got a vigilante that has done some exploring in the Rogue Isles, and now the Blue side SG has earned the beacons. (They show up in the SG Exploration badge menu on the compass).
However, during base editing, these beacons do not appear in the Place Item window, so no TP'ing from the SG base to villain maps.
I'm guessing this is by design, but maybe a bug?? It would be a really nice feature for vigilantes/rogues.