[member="Durza the Zealous"]
Sorry for the late response on this. The short answer is yes, development will be required. The length is dependent on the judge and how powerful the species sub is.
Species:
Any Sithspawn or artificially created race. If it's the result of alchemy or genetic engineering, extensive development will be required. Expect a minimum of 50 posts to be assigned, and for truly monstrous or powerful species, it goes on up from there.
Any species with exceptional physical or mental abilities. This includes things like regeneration, unusual strength, resistance to certain types of damage, or innate Force sensitivity. Generally speaking, development threads assigned that fall under this category will require a minimum of twenty posts, but can be made longer or shorter at the Judge's discretion.
Warrior cultures. If everyone in a culture possesses formidable fighting skills, you may be asked to write a development thread, especially if their skills could be potentially unbalanced.
The most popular way to develop a species is from the perspective of explorers or scientists studying specimens for the first time. Focus on the relevant aspects of the species's culture or physiology. How did they get their abilities? What evolutionary forces guided them to their current state? How do they perform in combat? These are all important questions that will need to be answered.