Brown is a complement color mix of red (primary) and green (secondary blue+yellow). This particular batik tends be a bit on the blue side of brown with some gray mixed in which is why I selected these particular colors as possible quilting threads. I have three matte colors and one with more luster.
The Mettler matte brown is barely visible on the darker parts of this batik but will be more obvious on the lighter areas. That means I have to decide if I want the quilting more visible on the light areas and disappear on the dark, or I may stop and switch colors.
The Mettler matte gray will blend more evenly across light and dark and show about the same balance of visual definition. The Mettler matte blue that is slightly on the gray side with have a bit more pop on the darker areas of this batik. This could mean a color change to transition between the medium and dark.
The DMC matte purple will play off the red and blue tones of the brown and give a little bit of unexpected color interest while still not shouting 'Here I AM!' like an orange thread would. The shiny Floriani thread I would probably only use for the dark and medium areas. The shine will make it more obvious on the surface and the dark on the lighter areas of the batik would just be a bit too dramatic than I have want for this quilt. I want the quilting to balance across all the color variations of this batik.
Don't limit yourself to just a color selection that matches your fabric when picking your threads. Throw in some odd colors or zingers and see if you can't find something that will make your quilt sing.