Batman
Not all those who wander are lost...
I don't see any reason to believe she is Impa. I'm pretty sure she's simply his grandmother.
I don't think Link's grandma is Impa, because that was never established. Therefore, it is currently untrue. Besides, Impa has historically been Zelda's caretaker. I doubt her character's role would ever be switched like that.
While nothing like this has been confirmed it actually does make sense to me.
SPOILER ALERT
In the end of SS you know that (if you played SS) Demise cursed Link an Zelda and his hatred would come back in a cycle. With this, Nintendo confirmed that all links and zeldas are from the same bloodline, WITH THE EXCEPTION of the Link om WW.
Maybe the gods knew that this boy was meant to be the chosen hero, but since he wasn't in the same bloodline as the other heroes, the gods had their doubts. To protect him and raise him well they couldve sent an agent to be his "grandmother". You never know, it could be possible
While nothing like this has been confirmed it actually does make sense to me.
SPOILER ALERT
In the end of SS you know that (if you played SS) Demise cursed Link an Zelda and his hatred would come back in a cycle. With this, Nintendo confirmed that all links and zeldas are from the same bloodline, WITH THE EXCEPTION of the Link om WW.
Maybe the gods knew that this boy was meant to be the chosen hero, but since he wasn't in the same bloodline as the other heroes, the gods had their doubts. To protect him and raise him well they couldve sent an agent to be his "grandmother". You never know, it could be possible