These are modifications uploaded by other members of the photo above. Download the photo by right clicking Download Photo and clicking Save As.
Posted By dark_lord : Cropped and Levels and Curves adjusted to brighten and boost contrast.
Posted By dark_lord : Had a go at quickly reducing noise in Photoshop Using Filter - Noise - Reduce Noise and a bit of Filter- Noise - Despeckle to give an idea of what you can do. This should work better on the full size original file rather than the small image here.
Posted By alistairfarrugia : Mod that includes the full head of topmost dude, and some space in front of them, for them to "walk into". The latter aspect was an afterthought in line with the typical photography "guidelines" vis-a-vis the use of negative space. Since they're walking, it does help a bit I to give a bit of context, but it's not critical and your composition works better to highlight the ">" shapes.
PS: Couldn't get the editing to look like your poster effect, this was done in 5 mins.