Hopefully we get one more villain that has a personality/name. And if we are getting Thanos later I wouldn't mind seeing a female character connected to him, like Nebula, leading an alien merc army before Thanos gets directly involved.
She controlled one against the Avengers before in the comics. From a ship that's identical to Thanos'. Plus, I think it could be more interesting than Skrull queen, while still allowing for the army to be comprised of skrulls and the other cosmic races. And you still get another female character/side-villain to offset the male to female ratio a little.
Here's why she might work and could be used in a way that wouldn't overshadow Loki.
from wiki:
Nebula
A brutal space pirate and mercenary, Nebula seized control of Sanctuary III, a massive spaceship previously under the command of
Thanos. Thanos was believed to be dead at this point, and Nebula claimed that he had been her grandfather. Nebula's band of mercenaries and pirates consisted of Skunge, Kehl, Gunthar, and Levan.
Nebula asked the second
Catain Marvel to join her mercenary band and aid them in conquering the
Skrull Empire. However,
Firelord learned that Nebula had massacred the
Xandarians. Nebula used her space fleet to attack the Skrull space armada and the
Avengers.
...
The Infinity Gauntlet
The newly resurrected Thanos was offended by Nebula's claims of kinship. He reclaimed his ship and almost killed her, using the Infinity Gems. He transformed her into a grotesque virtual corpse still barely alive, leaving her as a maimed and seemingly mindless zombie, burned and disfigured by his energy beams.
[3]
When he later claimed the
Infinity Gauntlet, Thanos boasted that Nebula was his greatest creation — unable to die, but not truly alive either. However, when Thanos defeated
Eternity and took his place, Thanos expanded his consciousness into the universe, leaving his body comatose. Nebula managed to take the Gauntlet from Thanos, using its power to restore herself to health and banish Thanos, seeking to conquer the universe herself. *(Here I'm thinking they wouldn't go this far with Nebula and will probably leave her dead if she's used.)
Abilities
Nebula is an athletic woman and an excellent armed and unarmed combatant. She possesses a gifted intellect and is a brilliant battle strategist.
Nebula uses blasters worn on her wrists that fire concussive blasts of unknown energy or heat blasts that can incinerate a human being almost instantly. She also apparently wears a device that enables her to disguise her appearance, either through illusion-casting or through actual molecular rearrangement of her body and clothing.
Nebula was converted by Doctor Mandibus into a cyborg. She was given an artificial left eye, left arm, and left shoulder. The left upper quarter of her head and part of her right hip are sheathed in metal.