Man, I really hope Mance gets some good scenes this season. He's so underdeveloped on the show. I want to at least get his story about why he abandoned the Night's Watch that they left out of season 3. Trailer makes it look like he's getting burned in the first few episodes, though.
Also, people pointing to things like "zombie riding and elk" and "lava arm" need to realize that those are the exact things the show runners are avoiding. Like it or not, they're toning down the fantasy elements, and that's not going to change. If a scene or character has nothing to merit it other than being "badass" or "cool", then it's probably first on the list of things they're cutting.