Journey to Batuu has so many possible synergies that are ignored.
Should be able to cut through the jungles with a lightsaber.
Using a lightsaber should also improve the swordsmanship skill.
Some packs could add an additional Kyber crystal to find, to put in a lightsaber to give it a different colour, maybe with a special visual effect even.
Could be possible to attempt to have a sword fight between someone with a lightsaber and a regular sword, resulting in the sword getting cut at first contact and requiring to be repaired. Swords could be upgraded with a special coating if you have Journey to Batuu to be able to fight someone with a lightsaber.
There should be a star wars themed rocket ship, or ships even.
Being an actual alien should give unique interactions in Batuu. Then again so should being a geek. Or a mage.
If you have university, it should be possible to build a protocol droid which could function the same as the simbot, but would look like C-3PO, with different possible colours.