If they are going to licence IPs from the BBC, or other sources, I hope they develop properly themed rides that take advantage of the IP. If theming is merely a name, logo, colour scheme and a few sound effects, as Hulk seems to be, then this is not particularly worthwhile.
An example of this is the old Thunderlooper with a Superman Theme.
It will be a challenge to design an immersive ride that will be enjoyable and understandable for all customers (dedicated fans, casual fans and people with limited exposure to the IP, those who hate the theme would be harder to convince). The ride needs to tell a stand alone story.
Dr Who has the potential to be a brilliant dark ride. A story could be written to fit a ride layout similar to Duel with a tight claustrophobic environment with a new scene round each corner. Some large immersive space scenes would add a lot to the experience, unfortunately these would also require a significantly larger show building increasing the cost substantially.
I would be wary of using IP strongly associated with specific individuals as reputations can change rapidly (unfortunately Yewtree seems to be one of the BBC's strongest IPs at the moment).