Exactly. A Tiled Sprite, but that doesn't have to be a square, but instead can be drawn with a polygon tool. Just like plugins like "Shapes on a plane" or "Polygon Tool".
The advantage of having this inside 2DTK is to be able to put the shape in a Static Sprite Batcher together with other sprites. If you don't like to build levels using tiles, being able to draw a big shape saves a ton of time. And since all required functionality more or less already exists inside 2DTK hopefully it would be a feasible feature.
Thanks for all your hard work on this amazing plugin
/O