Avengers Infinity War: Do Avengers 4 filming photos PROVE Loki twist with Tom Hiddleston?

Back in November last year, Chris Hemsworth and Robert Downey Jr were seen in costume, apparently on set for Avengers 4, which still doesn’t have its official title.

What’s interesting about the snaps is that an alleged body double for Hiddleston is also in attendance – with reports such as Just Jared claiming that Loki was involved in this scene.

Loki is seen in chains in the pictures, his mouth blocked in much the same way that Thor’s was at the start of Infinity War.

So does that mean Loki will be returning after all? Or were those photos for something else altogether, and the body double was not standing in for Loki?