You have several good things going on in your pic, but the element that first grabs my attention is the rays of light coming through the trees. I've heard it said that "bad weather makes good pictures" and I think your photo is an example of this. If you had taken this picture on a sunny day, it would have been just so-so. But the fog, the mottled sky, and the beams of light combine to make this an interesting landscape. As far as doing something different to make it better, I don't know what that might be. I tried cropping down the sky a little, but then you lose the darker spots near the top and the image begins to flatten out. So, in my opinion, I'd leave it just as it is. It's a darn fine shot.
I think the picture overall is great. My first impressions is of some turmoil and dynamic interactions in the photo. I think this is because there are some conflicts in the picture. The lights going through the trees would suggest more calming effects but the clouds and the raggedness of the plants in the foreground suggest a storm in the area. The fog can reinforce a calming effect or a mysterious effect in the woods. Probably reading too much into this picture, but it does make you linger and think about the picture and that is good. Excellent job.
I like the mist and how some of the trees fade into the mist.
There are too many elements (single-standing trees) and one of them is even smack in the middle - there is nowhere for the eyes to come to rest. Perhaps try a different camera angle, and crop tighter.
what I like is the extremely cold tone to the conversion; it's not an actual black and white but rather a unique monotoned image. These are notoriously difficult as you rely entirely the chosen hue to develop composition. Other hue, warm for example, may not have same affect, although it is a fine photograph so probably any monotone hue will be nice.
I don't like the lens flare. Slightly different shooting position, lens hood, etc., to lose it.