!! WARNING - SPOILER VIDEO !!
This is one of the first gameplay videos from Lost Mission, brand new mission on fresh released ID software Doom 3 BFG. I was watching part of it and it looks pretty cool. Check out the video (if you can survive the commentary of that guy :-P). Classic anti-demon futuristic action, with a mix of best creatures and weapons from both Doom 3 and mission pack Resurrection of Evil.
It looks like the designers used the existing asset libraries with adding bits and pieces to built new levels with fresh look, keeping its horror elements, but more focused on action. And that reminds the good tradition of classic Doom, which suits pretty well to this All-Doom pack release. Btw. the UI changed from the original version. It seems ID really gave this game some fresh update.
I wonder how the game would look like, if they actually made one of the open-door levels with high towers and vast fields full of demons and approaching robot spiders. But using idTech4.