First of.all, i want to say that this topic isn't made becose i don't like your helmet looks at the state that it is in wright now. No, actualy i like it a lot, and this is made, to upgreat it ewen more, and posibly make your helmet come into the game. Why i can, and want your helmet in the first place? It is very simular to my own project of his helmet, bit i can't work till i get new pc, so insted of making my own, i want to share my dew thoughts to you. Then we bouth gonna have stuffs we want- You, your name in the game with this helmet along, I, helmet that actualy i like the look of.

So, here we go.

Lets start with over all shape: it need to be slighty higher. It is not my complain, but actaly thing that all his helmet have in common. Your need a litle more high. Maybe do this kinda ring that is on revenant armor( vasala, if i remember correctly), or sentientic dounta like shape in a front. Somthing to make your helmet higher with not interfiring with overall flow of it.

Next: rabbit ears thingis. I know taht they should made helmet higher, but they are not wright with revenant overall look, somthing in them not mach him. On the other hand, ear like design on the helmet could look cool, but not rabbit, insted i would use the bat ones. They would cach more of his flow, and them( sentient-vampire warframe).

Last thing that realy need modyfication is his ponnytaill. From at least my perspective it is slighty to thiccon a start, which makes him look to much like bad design hero from anime, which even tho warframe is game that have a lots of anime within it, you should turn it down a lilte.

On the side note, but you realy don't need to do it, or even shold do it, i would do a litle energy beard on the front, but this is only purly my staff...

After all, your helemet look awsome, and i realy want to see it on my revenant. I hope that it get to the game, with, or without changes. So keep up with good work, and have a nice day.