Porting may not be a problem. All SW games I own on GOG (both KotORs, JKO/JKA, Republic commando, original Battlefront II, TFU 1&2, Empire at war) have same Disney Terms Of Use. If you read section 3 carefully, you will find the next paragraph:
So, basically, Disney allows us to use their assets (not only from SW, but from all their stuff). There could be arguments about new media (such as EA Battlefront), 'cause they will also have EA's terms of use, but everything released before Disney buying Lucasfilm should be OK.