Do you really think he can't be recalled? He can be, he will be. He is an Australian citizen and if they find holes in his testimony they will expect an answer from him. There are extradition treatise between Australia and America.
I don't know presume to know what will happen in the end, but the GB will be established as the "spokespersons" for the WTBTS. This is the main authority that controls all the lives of the rank and file members. This leads to further questions that will arise within the RC. Still, I confess that I don't know where it will end.
I do know this. Justice McClellan asked him GF, if he would consider a joint effort at redress for victims of abuse. Jackson said "yes". If they refuse to do so, there will be questions as to "why" they don't actually go ahead and join in with others who are willing. This will be damning for the society. It will show a lack of co-operation on the part of the WT. This could lead to further investigating into the financial workings of the society.....In a strange way, I hope they the GB, will view Australia as small fry and not important. This could be the best outcome. Underestimating the legal powers of another country is a dangerous route....WTs underestimation could fly straight back in their collective faces.....