Next Art Series (Patreon)

Now that I've finally wrapped up the Astra Militarum posters, I am without a new series. While I'll probably start the next thing in November, I did want to put some feelers out for what the next thing should be. 
Here are a few ideas, but it's all nebulous at this point. Feel free to suggest in the comments as well.
As for the canon character series, I'd be doing something similar in form and style as the Primarch series.