About the new champion

So regarding the new champion teasers. We have seen all the teaser pictures and from what ive seen i think i can piece together a theory about the new champion I think that the new champion will be a adc and he/she will have element shots, by that i mean he/she will have skills that somehow represent the four elements earth, wind, fire and water. And his/her ult or passive will be similar to karmas ult which will modify the element wich was used last. If you have any questions ill be glad to answer them