It's just speculation based on how Homura's white wings had turned witch barrier-ish by the time of the epilogue, plus whatever that final explosion meant.
RaisingK said: It's just speculation based on how Homura's white wings had turned witch barrier-ish by the time of the epilogue, plus whatever that final explosion meant.
I guess...
it just doesn't make sense to me seeing how Madoka made it so there can't be witches anymore
Do note that Chinchen said that Homura had the power of witches, not that Homura was an actual witch. An abnormally long life as a magical girl, holding despair at bay through sheer force of will, could do some interesting things...
So we got the Antisocial Butterfly, the Cheese-and-Dessert-aholic, the Pop Idol, the Biker, the Club-Swinging Nun, the Mermaid Queen, the Circus Showgirl, the Schoolgirl, the Nymph, the Mistress of the Night, and the Ultimate Witch with the Ultimate Successor.