THOR 2: The Enchantress to Be Featured?
According to Bleeding Cool, it looks like when Chris Hemsworth picks up Thor's hammer again, he'll be using it against a character known as The Enchantress, who was seen a number of times in season one of the animated Avengers series.
No other info is known at this point, but here's a brief description of the character from Wikipedia:
"The Enchantress is a member of the race of superhumans known as Asgardians, and as such possesses superhuman strength, speed, stamina, and durability but prefers to avoid physical conflicts. She possesses an innate capacity to manipulate ambient magical energy, honed through practice for a variety of effects, including projecting magical power bolts, interdimensional teleportation of multiple Asgardians and non-Asgardians, protective energy shields, illusions, levitation, conjuring, transmutation, telekinesis, time-disruption, mind switching, and mind control. She has used her sorcery to enhance her natural beauty and allure, and to enchant her lips so that by kissing virtually any man she can make him her slave for about a week, unless she renews the treatment. She can also use her magic to heal any of her injuries rapidly, and possesses limited mystical senses. A prolonged absence from Asgard tends to diminish her powers although they never fade completely. The Enchantress has been described as one of the most powerful sorceresses in Asgard, second only to Karnilla, although their every direct confrontation has ended in a stalemate until interrupted. However, Amora's sister Lorelei was later also enhanced beyond her own abilities. The Enchantress has a gifted intellect, and possesses extensive knowledge of Asgardian mystic and amatory arts. On occasion, the Enchantress employs various mystical artifacts, potions, and power objects, such as the crystalline gem in which she entrapped Brunnhilde the Valkyrie's soul, and the potion she used to increase her hypnotic power over Thor in Avengers #7. It has been shown that Enchantress is unable to access her spells when her hands are bound and her mouth is gagged.
"Initially unbeknownst to her, Enchantress II's powers are given to her by Loki. Wiccan states that she may not fully understand how powerful she truly is. Her powers and abilities appear similar to those of the original Enchantress. She is able to teleport many people instantly, maintain a secret fortress with her magic, and transform objects and people into whatever she desires, such as turning several henchmen into frogs. She also demonstrated power enough to stop both the Young Avengers and Young Masters during their battle and separate them."