The hook (or sicle) is unquestionably representing Marethyu, and the helmet symbolizes Mars. The top right image is the last two pages of the Codex: maybe we'll see something of Josh and Dee, as they're posessing the Codex now.
As I suggested before, the mask looked more like Aten than Tutankhamon to me, but it's hard to judge by such a small image.
But remember the jade scarab beetle Scatty had? She gave it to the young pharao, but after Tutakhamon's death, she kept it. Also, the scarab was a sacred animal in Ancient Egypt, and it was connected to the rising sun and harmony.
For the central image: lightning might represent energy, and indeed you can see the seal of Salamon, but as it was suggested earlier, it might be Danu Tallis during the battle, and lightning comes from the colliding magical powers of the original twins.