I came across this list of upcoming comic movies:
But I don't recognise this icon, can anyone tell me what/who it represents?
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I haven't actually seen this logo used in conjunction with the film, but Aquaman is currently slated to be released on July 27, 2018.
You may notice that the logo resembles Aquaman's belt... buckle?
It seems to be a fan-made Aquaman logo.
I had a look using some reverse image lookup tools (Google Images, Tineye) for similar designs, and there weren’t many results. I suspect this is just fan art, not an official logo for the film.