welp, apparently there's a lower half of my posted screenshot, and the gist of it is like this:
Originally, Mikado's wish was to find Maria's parents, which will reveal her as Hayate's sister. But even before that, the plan was to reveal Maria as Hayate's sister even earlier as Hata didn't plan the manga to continue for so long. Things happen, and eventually the planned plot of Maria being Hayate's sister was abandoned.
So, relax guys! It's a false alarm.
