This theory just struck me.... how could we ever forget Alice & Frank Longbottom???
I mean, we know that Frank & Alice were friends of James & Lily before they were driven into insanity by that Bellatrix LeStrange😡
So obviously, they do know a lot about the Potters.... my prediction is that either of Alice or Frank will get better.... their memory will come back & I think that they will have a secret which will help Harry defeat Voldemort....
I think its more likely to be Alice who'll get better... I dunno why but I do have a feeling its gonna be her....
What say you?