they most certainly could produce one or multi kits . Problem is mainly the RRP .... the thing would cost around 200 euro (dont pin me on this!) and to be fair quite a lot of hobbists dont have that kind of money to spend on just one kit (i would but thats another story)
Its funny reading the last few sentences back: people would buy 2 battle forces (roughly the same price) with a lot of models in it rather then a 1 model kit. damn marketing ..............
and on the subject plastic kits - i know your are reading this GW watchdogs- Go fetch me a plastic thunderhawk!!