This is the problem of large specialty sets to be re-released. A set of this magnitude would be close to the $100 mark. In the past the ones geobra was willing to re-release have a much larger broader audience..... medieval, construction, Victorian.
Right now Geobra along with FAO/TRU released the expensive Victorian house w/5300 colors. This has been on many members re-release list for some time. Now that it is available it is not moving according to TRU and Geobra. It is quite annoying for them to produce such a set and not have it sell. I think one of the problems is it is being sold for $130. Now it is on sale for $86 but you have to buy 3 and this is still expensive for most.
I am not sure how many they need to satisfy their bottom line now that Geobra has better molding machines and the most modern mold making machines. It used to cost thousands of euros to make a simple mold but that cost has been going down steadily
I am sure the collector community is not the only ones who will have to absorb all the train sets. I would suspect that many of them would be distributed for "normal" sales and we just need to fill in the holes.
I suspect that this attitude (sets on requests) is in place for any set to be re-released.
I could/would buy up to 3 of such a work train set even if it only came with the train and no track etc....
Now if it was a western train I would go to 5
especally the coveted 4052. I just do not like the RC too much and would prefer it to be easily converted to track powered.