The vocal track used for this particular remix with Bieber is the same as the one Tricky's team had been working on (DJ Stolen only had a work in progress mix). The production is also following Tricky's rework.
Jacksons have - fortunately - no access to such stuff. If they had, there would have been dozens of strange mixes like "Opis None".
It also makes sense that "Max Methods" would be given Tricky's work. The same was done with DJ Chuckie and the 2 DJs (Dave Pensado and Drew Adams) that mixed the Throwback Mix of "Hollywood Tonight", they were all using the vocal track from Teddy Riley's team, not the original. And these mixes were also fast jobs.
Justin Bieber said:
No the family gave it to him a year ago to finish saying that is what MJ would of wanted"
Assuming this is really Justin Bieber talking about the song:
Look at this. Who is "him"? Tricky? It actually can't be "Max Methods" since Tricky was commissioned with the track in 2010.
And even if it was "Max Methods" ("a year ago" would not make sense regarding Tricky), the track was in the hands of the Estate that hired Tricky first.
I'm pretty sure if Justin Bieber really refers to the family with "they", then that's because he's a youngster who talked with the kids and has no idea that it's the estate that is in control of Michael's music and not the family. Artists usually don't know much about the legal aspects of their work, especially a youngster like Bieber.
"Max Methods" did almost nothing, he took out sections from MJ (from the vocal track finished by Tricky), putting in Bieber instead and replaced Tricky's production with some quickly done house stuff.
