Not used to writing reviews but I will give it a try.
The story was basic but good enough to have a plot for it.
The art wasn't good quality, they used real life places (the building where Fuji TV are based) and put the 2D characters from One Piece (when they had 7 members) and DBZ (when Gohan is about 17). Also this was aired at a public event so it as split up in 5 or 6 screens.
I found it ok when I could see it as it was mainly fighting sceen so I didn't mind that. But it's on youtube but it isn't subbed
nor is any of the videos good quality, so don't have too high hopes.