Prediction for Next Champion [Moved to Gameplay from Story, Art, and Sound]
So I noticed SA&S has been pretty quiet lately outside of Elementalist Lux's imminent release, so I thought it might be fun to brainstorm ideas about the next new champion which will hopefully come out before the end of 2016.
As a recap, the releases this year have been:

So, in order, we have a Marksman, Mage, Mage, Fighter, and Jungle-Support. Prior to these we had:

We have a Figher, Jungle-Marksman, Tank-Support, Fighter, and Mage-Support.
You will notice that 6 out of 10 of these champions have a strong roaming potential and/or mobility spells. For example, Taliyah ult, Kled ult, and Tahm ult all help you and/or teammates cover a long distance quickly. Another trend is the two untraditional Junglers. Kindred was produced as an experiment of a Marksman Jungler and Ivern was produced from the idea of a Jungler who does not kill the camps. Bard was the only champion of these 10 who was designed for Support in a 2v2 bot lane (if I remember correctly, Tahm was initially supposed to go top), and Jhin was the only champion designed as ADC in a 2v2 bot lane. Kled and Illaoi are AD, tanky top laners, and Taliyah and Aurelion Sol are AP control mage mid laners. Ekko seems to have been the most flexible champion with different builds and going mid or top depending on how he is played.
So where is this taking my predictions? I don't really know to be honest. I think it will be a shot in the dark at this point. But, my guess is a new traditional bot lane 2v2 Marksman. Our last one was Jhin 9 months ago. Prior to Jhin (not counting Kindred, since they are a Jungler) we had Kalista who was over 1 year before Jhin, and before that we had Jinx and Lucian who came out over 1 year before Kalista. We already had the Marksman update earlier this year, so all of our current champions have had a pass. Assassins just got their roster update, which means they should see more play, and who do Assassins love to kill more than a Marksman?
As far as being unique to our current Marksman roster, what is left? What possibly new abilities are there? Well, for one, I think we could have someone who legitimately has a fully automatic machine gun. Maybe instead of individual auto-attacks this champ can turn attacks on and off using an energy system to gate how low the gun shoots. Or maybe it could be a laser, like a mini-Velkoz-ult. Or maybe it is a ranged whip-wielding Yordle, like I have proposed in the past? The auto-attacks would be similar to Thresh, but it would be a whip. There could be a lasso ability which allows the champ to swing like Indiana Jones.
What do you guys think? Any other predictions? I love talking about this stuff!