The TT+ conversation

Has gifted a possibly hint about the New heroes summon... If not legendary hero.

The other "Spirit" Said to be the bird, nothing more than the Goddess of Chaos Yune. The sealed "dark god" since FE PoR, and the most revelant plot character from the capter 4 "gods and man" of FE Radiant Dawn.
She possesses Micaiah in order to counter the jugdment of her sibling Ashera, Goddess of order, against the beorc and laguzes... And to disappear, to give a world with no gods.

She gives the clases change to Ike, knows as legendary gere, Also to Sothe and Micaiah herself.

Welp, the priestness class has the most overpower skill, corona, that cuts resistance of foe by 100%, in heroes Destroy every mage you see...

Unfortunely, against the final boss she does better job as supporting and healing, having desvantage against every enemy and doing bit more than 10 damage against a final Boss of 120 Hp with monstruous self healing, Also with nihil skill that negate activation of every F#$&ing skill.

Maybe IS only shown to us an easter egg of Yune during TT+ ? Hmm...