Top Gear makes huge revenues for BBC worldwide the trading arm of BBC, thats why its still going, as for the presenters , perhaps forumites can name 3 presenters to take their places, to appeal to a worldwide audience, and not just Miranda fans as above.
As for a new format, what about a has been celeb racing round a track, or a chap dressed in a white romper suit doing the same,you could have over priced cars being driven at the speed limit round the country, with a driver going on about the steering and suspension, and the seats etc,Possibly a chatty bit with the unknown celeb,all surrounded by an audience of overweight middle aged blokes looking at cars they’ll never afford or even drive.
Chuck in some jokes some un politically correct chat, some forced laughter,and loud engine noises, and we have a programe.
On that Bombshell………..
But that was the past, the future must be a change