Mai mui is expected to return. She was 7th Garuda. But is dead now.
Each Garuda has some speciality. Most of us know about 6 Garuda's qualities already shown till now.
One possibality of Mai mui's return can be she as a Garuda had quality of Phoenix, who can regenerate from own ashes.
Phoenix is also associated with Fire. Mai mui was living in smashan at Manikarnika ghat, used to give wood for pyre.
http://www.ehow.com/about_6401530_phoenix-bird-information.html
Some legend mentions, the bird is surrounded by fire, is made of elemental fire.
The Phoenix is used as an inspiration in many stories. It can be used in the crest of a city that was burned down during a war and then reconstructed, as well as in the symbol of a shield of soldiers or travelers that returned after their families and friends thought they were lost and killed. The Phoenix is also used as a Christian symbol, since the legend of its death and rebirth has similarities to the story of Easter. The Phoenix symbolizes recovery from a tragedy and regeneration, so it may also be seen in the logos of organizations for people who are recovering from an illness, or the death of family members.
http://en.wikipedia.org/wiki/Phoenix_%28mythology%29
Scholars have observed analogues to the phoenix in a variety of cultures. These analogues include the Arabic anqa, the Hindu garuda and gandaberunda, the Russian firebird, the Persian Simorgh, the Turkish Zmrd Anka, the Tibetan Me byi karmo, the Chinese fenghuang, and the Japanese h-.