Depends on what exactly you mean under "Material Design layout".
In terms of Swing "layout" is a slightly different thing - a specific implementation of the way components should be layed out on a container. In terms of Material Design, as far as i know, it is a combination of multiple things.
If you mean the general style of Material Design and whether I am planning to add a skin that will reflect that style - then yes, I will be adding a skin representing Material Design style in one of the future updates. That is certainly one of the skins I want to add to the set.