In an Oak forest the theme has been on our watch (modern forest practice) to stop fires. This change in the normal events of nature has led to a problem for oaks. The hole you see is because of a Shumard oak dying. I came here to see what tree will take its place.
The mighty shumard oak has fallen and now decaying after a few years. Click on the Shumard oak link below to see earlier posts of this tree.
Trying to get a photo of the tree most likely to take its place is a maple. Maples are not as valuable as oaks and are further along the progression of a forest moving from a vibrant stand of oaks to more modest trees that come up under them without any disturbance.