One can say that it is Coruscant, because the devs haven't denied that it would be in KotOR II. On the other hand they haven't replied on whether Yavin, Endor, Hoth or Calimari is present either.
I do hope that they include Coruscant however, but it might be a part from Telos that has gone trough a severe re-buildup since Malak carpetbombed the surface to Oblivion.