This could be one of those images where a heavy vignette applied to the foreground to reflect the top of the shot, might work really well and help to push the viewers focus onto the main subject of the image, which is obviously the lion.
I am not a big fan of really heavy vignettes, but as you already have the top half of one in the shot, perhaps replicating that type of darkening effect to the bottom of the shot as well, would work quite nicely.
Dave