I typically don't go in for rumour posts, but I feel like all the attempts to decode the Genestealer Cult teasers posted on GW's 40K Facebook Page have been a little amateur hour. A lot of people are talking about seeing Power Loaders and mechs in those grainy, shadowy photos, and I think it's just optical wishlisting.
I ran a couple of the photos through Photoshop's ENHANCE! filter, and here's what I came up with:
First up, we got this one, which came out yesterday: