This is from a Japanese site.
The Toei representative I mentioned that appeared on stage was Norihiro Hayashida; one of the producers of the Majin Buu Arc.
He mentioned that its their intention to make this Arc as faithful to the manga as possible, some examples are:
Majin Buu with crossed arms (left arm on top of right) in manga but it was the opposite on the anime:
Spoiler:
Spoiler:
I have not confirmed these mistakes, I'm lazy to check, and I repeat, i got this from a Japanese site. (my Japanese is far from perfect and that was what I understood, I didnt catch these at the event there was a lot of noise as it was an open stage)
I also got these 2 last images from the same site, I did saw this poster but my camera battery was dead by that time.
Spoiler: