I will bet money $ on it that they do more numbered jobs. It would be madness not to do more. They will change it from the 200 and 300 types, because many many people are demanding more n more of the 500 they missed out on.
Why wouldnt STERN do more numbered jobs and just change them from the 500 they have already sold. $$$ dictates that they can milk this cow til the proverbial cows come home. I can see the press release already from STERN "due to an unprecedented demand for the X and XX models which we SOLD OUT of in just hours of release, we have decided to release a XXX model, limited to only 1000 numbers, to add and enhance the current line up of AC/DC machines currently being offered in the PRO and Premium levels". I will bet money on it. Why wouldnt they do that. As long as it is different to the Back in Black or Let there be Rock models, people of all sorts will be very very happy. They might decide to sell a big whack of Pro models and Premiums first, to put a little distance between the first 500 numbered jobs, but it will most definately happen. I would do it in a heartbeat if I were STERN. Who is going to not want to see a different style of numbered job.
I will buy the Pro and wait for the next numbered job to come out later to possibly upgrade or add to etc.
What about one of those Angus school caps for a topper on the AC/DC pinball. Might look ok ?