As you may of heard of the EPF Mission Operation: Blackout, well here is what I think is a spoiler for it. As you know that Herbert will destroy all major light sources in this Mission hence the name. If you pause the video near the beginning you can see Herbert holding a sheet showing what I think a picture of the sun crossed out.
Here it is:
If you can see him, he is next to a tree down in the bottom left hand corner, he is holding a sheet like I said. Do you think Herbert will return? Do you think Operation Blackout commence shortly?