suggest you ideas to 343 for new leaders in Halo Wars 2 like a Queen Kig Yar, a Commander grunt etc.
Personally i want a sangheili swordsman as leader, that is the right hand of Let 'Volir. 
The prophet…some throwback to original game. A leader with hawks. Vampires would be cool too.
A Drone Queen would be good and add a whole new set of possibilities to the game
Grunt Goblin.
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> A Drone Queen would be good and add a whole new set of possibilities to the game
yes with drones that replace engineers allowing them to attack and heal when out of battle.
I know Spartans don’t usually command forces beyond their own squad, but that would be an obvious idea. The game seems to be linking up with the same time as Halo 5 so you could have Fred or Kelly, or even Master Chief
Captain Keyes would also be an option since they brought Forge back.
They could bring in Major Silva from The Flood. He could be more infantry oriented and they could give him ODSTs from the barracks, with larger orbital drop numbers than Cutter.
The ship master would be rad. Plus I’d like to say he’d have a few choice words for the brutes lol