Yes, only time will tell. I think she is connected to rogue because they touched when she was a child and I think the cure was product of her nature as phoenix - she not only burned the strain 88 away, she also erased all the memories and personalities rogue had absorbed over the years, something more consistant with TP.
Regarding madelyne, there was a point to make her look like jean, it was so cyclops would obsess over her, thinking she was jean and that would create the drama between them. But what would be the point with Hope? Notice that, unlike the Prior situtaion, none of the characters recognize the similarity and yet she is painfully identical to Jean to us readers, specially in cover art.
"At the San Francisco Wondercon, when asked about Jean's future Matt Fraction told the audience "There's a little girl with red hair and green eyes in the future that you should keep your eyes on" in reference to Hope Summers"
Originally from
http://www.newsarama.com/comics/090301-wondercon-xmen.html