TheTsunami said:
I'm with the earlier posters, that definitely looked like a wedding scene with Ayaka as bride's maid and Fate as the best man, so Negi x Asuna (thus fulfilling the standard rule of all harem series).
http://www.mangareader.net/mahou-sensei-negima/355/16 Their wedding,
http://www.mangareader.net/mahou-sensei-negima/355/17 Guests to Natsumi big moment :) If it was Negi and Asuna wedding he would stand right by her side.
Why would Asuna end up with Negi when 1-2 chapters ago she was shocked about who he likes?
Chao comes from alternative world where we got the "bad ending" that She had to fix. She was not born in the normal time line since events were changed and Negi probably didn't end up with her ancestor.
I still think some Final Anime series or movie would be nice to cover all the missed manga parts. At least he ended it when he got burned out. Bad ending but better than dragging it forever with pointless plot twists.