Prelim pictures of the Pirates of Umbar set box showed (in small drawing of figs included at the bottom of the box front) the 2 orks with new helmet and armor that looked a lot like the armor worn by moria orcs. I expect they dropped those to keep mold costs down (but also lost sales to me!). I think the same is true with MEA. They only had money for new Thranduil hair, and added hood because the polybag was so popular. Since by making a elf helmet for MEA, they could have also reused it for Hobbit 3rd wave/BO5A sets to spread out expense, it makes me fear we'll get none at all.
It is similar to the Black gate set like Darth Caedus said Putting not just Rohan soldier in it, but also Gondor soldier with new helmet, and that set sells much stronger (I know, too many good guys!), and have the helmet ready for a $30 army builder later.
.