Hi all!
I need an advice, please
I intend to upload a batch of shots dedicated to characters of computer game S.T.A.L.K.E.R.
My models are the fans of the game and cosplaying characters - soldiers, monsters, survivalists, etc
Copyright on game and its designation belongs to GSC Game world company
Unfortunately, I do not know exactly whether patented images of characters or not
Here are the characters of the game
1) Guy in Seva suit (Dolg grouping)

on my photo , he looks like this:

2) Guy in Zarya suit

or

on my photo , he looks like this:

4) Scientist and guard in SSP suit

on my photo , they looks like this:

5) Mercenary

on my photo, he looks like this:

The case is very simple
How exactly should i retouch the photos to avoid rejection on microstock agencies and - equally important - avoid accusment on copyright infringement?? and whether is it worth to upload such pics?
Will there be enough if I remove ALL logos, patches, etc.
or should I change the color of the costumes, to distort them, do something else?
Thanks!