I'm sure it won't be a hatchet job. They will be aiming for impartiality. The danger is just that they will double down on their highly defensive version of impartiality, i.e. the 'both sides' approach, presenting each 'side' very passively without any real commitment to investigation or truth.
This might happen in one (or both) of two ways. The more annoying of these two ways would be to adopt the familiar rhetoric of 'faults on both sides' in relation to the trans debate specifically.
But even if they manage to avoid unreflexively adopting this narrative (which I genuinely think they will strive towards, given the recent harch criticisms of their coverage), there is still the institutional failure of their general approach to 'impartiality', which you see again and again across all of their coverage of political issues.
Sooooo frequently, they just rehearse each side of a contentious issue, giving each equal time, and subjecting the people on both sides the same sort of performatively adversarial interviews. They seem to forget the possibility of investigating, analysing, coming up with a take that is 'impartial' in the sense of being well evidenced and objective.
I don't know whether this is because cost-cutting has deprived them of the journalists to carry out this work, or whether they just feel so frightened of losing their licence fee funding that they can't step out of the bunker. It isn't just the government they are frightened of. It is also mass public opinion, which seems to have lost the capacity to appreciate research, evidence, truth, etc., and just wants to have its various perspectives 'validated'. So the BBC dutifully validates each, instead of actively assessing each one.