I'm surprised so many people know about Downton Abbey, when it was usually on at the same time as Top Gear...
Ultimately, it's a train set. Do you think our 6yr old is too bothered that his Micro Scalextrics set is branded for a Bond film he's too young to see, has tracks that have no relevance to the film, or features cars he'll probably never drive, all he sees is a silver car and a dark grey car (that coincidentally are the colours of Mummy & Daddy's cars).
If it all goes pear shaped them I'm sure Hornby will put the track and controller into another set and sell the loco and stock at bargain prices on their stand at shows *, a noble gesture that does more to support juniors in the Hobby than moaning about a toy train set on a Model Railway forum. It's not like they have attempted to produce a serious themed set like the oppositions WW1 Ambulance train with the GWR City instead of a RoD Mogul.
(* 6yr old also has an O-4-0T and a Toy Story 3 Train procured from the Hornby stand).