User blog comment:SylveonFairyfan1996/New Elements in Ninjago/@comment-27747281-20160303010539

Honestly, a lot of these already correspong with existing elements;

Wind- Sky and Gas (depends on what kind)

Earth- Stone and Sand

Light- Lunar and Solar

Poison- Acid and Gas (Depends on what kind)

Nature- Jungle/Forest and Wood

Energy- Cosmic Power

Metal- Magnetism (Since it would only apply to certain metals, in the end)

Speed- Time (Technically, time IS the movement and speed of the world, in a sense, and while not canon, Lego Dimensions classifies Griffin Turner as Master of Speed and TIME)

Water- Weather (In The New Ninja, Nya summons some storm clouds to fight off ghosts)

I'm not so sure about Bug, Insect, Life, Spirit, Fairy, and Dragon. Having control over those would be like controlling Djinns; Dragons, like Djinns, are beings from another realm (or are at least implied to be) and are sentient. Personally, I'm not so sure about the idea about an element solely relying on the control of other living beings, some of them sentient. With Nature, it's okay, as plants don't really think or anything like that.

I don't really see much use in fighting as its own element, as it's a skill that all people can learn. Plasma, I'm not entirely sure WHAT it is, but if I had to go out on a guess I would say it'd correspond either with energy or fire. Matter is also very broad, though it might be energy, depending on what you mean by it.

Finally, Ghost energy does seem pretty cool- But in the end, I think it mostly goes along with energy, especially given the similar coloration. Also, the fact that it's technically from another realm might be of something to note. Sure, Cole, Yang, and his students became ghosts, but that was in a temple connected to a portal most likely leading to the Cursed Realm.

All in all, while I'm not entirely sure about most of these (except Time, but as I said, that's like Speed), it's mostly because a lot of them are technically already in Ninjago to begin with!