I read someone comment that SMN will be added but they wont be able to summon Ifrit and such because atm they are gods in the story line for beastmen but if i'm correct SE is going to overhaul the story line completely too so i suppose they will make it so SMN is able to call Ifrit,Garuda etc.
So garuda would be the goddess of Ixtali?
Yes, Garuda is the goddess of Ixali, you learn it in a cs of the main storyline.
Phoenix> like you said, Yoshida announced that summoner will be added but he explained too that primal will not be summonable by summoners. They'll change a large part of the storyline but they 'll keep the background of the game, so primals will still be gods and only free compagnies will be able to summon them in some specials circonstances and the effect will be very huge with even a change of the weather of the whole world for the time of the summon.