Tatooine is 100% desert
Hoth is 100% ICE desert
Endor is 100% wooden planet (but with Oceans I think too so this would be the most varied planet)
Sullust....is a desert/lava-volcano planet
You can easily work with these environments.
Tatooine: city, desert, Jabba's Palace, rocky desert, etc.
Hoth: caves, desert, Echo base, etc.
Endor: Which isn't just a big forest (Endor's terrain was largely covered by massive, tightly-knit pine and redwood forests. However, the Forest Moon also contained vast dry deserts and grassy plains, small oceans, secluded lakes, and mountain ranges.) so you can make dozens of maps on that one alone but since no battle actually took place outside of the area around the shield generator they might just focus on maps like, shield generator bunker, woods in the vicinity, Ewok village.
Sullust: ash wastes, mines, cities, etc.