Until he actually appears onscreen saying "Hello and welcome to Top Gear" there is no concrete evidence that he will actually present the show. He might die or contract some kind of restrictive illness that prevents him working. He might have a major fallout with the producers and resign. He might even do a Jeremy and get sacked. We simply cannot predict the future. Until he's definitively on screen he is not yet a presenter, and not a minute before. And the whole argument about a "presenter not having to present to be a presenter" is ridiculous. By that logic, a cyclist doesn't need to cycle, a writer doesn't need to write and an actor doesn't need to act. OK, that last one is open to interpretation, but you get my point. Of course a presenter has to present, to suggest otherwise is madness.