Some leaders design I did:
Hannibal Barca (Militaristic, Diplomatic):
- Military units in a commander radius and Commander can go through mountainous tiles
- Cost less to levy units from city states. Levied units from city states are stronger
Unlocks: /
Civ Choices: Carthaginian (Historic), Almohad (Geographic), Morocco (Geographic)
Starting Bias: Coast
Languages: Punic
Probably will have to refine it once we have the info on Carthage to make him fit better with them but basically the goal was to show the mercenary focused army of the Carthaginian alongside with the crossing of the Alps. Effectively it mixes Mathias Corvinus bonus with Civ 5 Carthage but I think it works well for Hannibal.
Yi Sunsin (Militaristic, Scientific)
+5 combat strength for naval units and +1 movement range for them
Defeating naval units gives you bonus science
Unlocks: Goreyo (Exploration), Joseon (Modern)
Choices: Silla (Geographic), Goreyo (Exploration), Joseon (Modern)
Terrain Bias: Coast
Languages: Korean
Now that we aren't limited to rulers for leaders, I think Yi Sunsin is an obvious consideration alongside Sejong for the leader of the Korean path. Gameplay is straightforward and simple but works quite well for him. The science gain are here to represent his innovations (and would blend well with Korean civs which tends to be science heavy in civ) and the naval bonus are here to show his military prowess and help him get his science this way. Since naval war is more niche than land war I added a movement and strength bonus. The combiantion of the two may be too strong but since this bonus will be especially situational on the antiquity era I think it would be okay.
Nezahualcoyotl (Cultural, Scientific)
+1 culture per age on wet and lake tiles. Cities founded adjacent to lake generate 20% more science(doubled in celebration)
Researching masteries gives you happiness towards your next celebration
Unlocks: Aztecs (Exploration), Mexico (Modern)
Choices: Maya (Geographic), Aztec (Historic), Mexico (geographic)
Terrain Bias: Lake
Languages: Nahuatl
Video for those who doesn't know him:
Leader for the Mesoamerican path. I like this design a lot as it meshes well with the civs of this path and represent him quite well:
- The culture bonus meshes well with Mexico and shows his poet king side
- The Science bonus meshes well with the Maya and shows his intellectual side
- The lake focus will probably mesh with some Aztec bonuses. It is inspired by his alleged design of the "dike of Nezahualcoyotl" and the fact that his city flourished near the lake.
- The happiness and celebration is mostly here to add a cool gameplay loop but could also be justified by the implementation of his strict legal system and the fact that he brought Texcoco to a Golden Age. Also meshes well with Mexico abilities.