I don't see anything in that picture to prove it was meant to be on the surface.
It might have been, of course. There is at least one interview or article (buggered if I can find it, these days) which refers to the scene of Predators stepping out of cryotubes being filmed and the creature effects book has a caption by the naked Predator costumes of them being made specifically for that.
Some things were filmed and still have not been seen.
It's a lot like the infamous scene in '
Alien', where the creature apparently unfolds from its guise as a weird box thing, as represented in the comic. It's never been on any official print of the thing or deleted scenes in any of its many versions.