This is what Hata mentioned in a radio show months before the movie came out
Recently, in the Internet Radio show "Hayate Sign", the author of the famous series Hayate no Gotoku, Kenjiro Hata made another appearance. This time, he revealed information about the third season for the TV anime to everyone. During the show, he announced that the upcoming movie for Hayate no Gotoku will be anime original content, with no relation to the plot of the manga. Of course, the third season for TV had been confirmed, and he will announce more in the near future. Please do not think that the original characters in the movie will debut in the manga as well, for those will remain to be original characters.
Nice to see you keep your promises Hata...