I don't think you should read anything into the change of court. Because we now have "speedy summary justice", although a case may start at one mags court, the trial will often be held elsewhere. Cases are listed depending on what court time is needed. For instance, some court now only deal with prelims and sentences but do not do trials. I suspect that this is what has happened here. Harlow I know only has one court that runs trials (the other is a general/remand court) so cases will be listed to fit around that.
As to what will be the outcome, what were the injuries? You have not given enough information to be able to assist. I take it you have legal advice?