Fair enough, it really WOULD make an awful lot of sense to have alternatives up their corporate sleeve. They could show one, or even more, of them at the London Show and yet STILL put an alternative into actual production. Possible even offer more than one alternative section as after-market products! Think model railways - very few sets contain switching points at all, yet several alternatives are available from every single manufacturer . . .
At the risk of being popped at for pessimism, they are not going to need all THAT many of these particular items to start with in time for next Christmas - I think finalisation of one or two tracke sections could be left for several months yet.