I have indeed plans to continue the set. I already collected a bunch of artwork and 'rediscovered' that a few days ago, which was a good reminder to check this thread again.

I hope to put some online next month, maybe with the latest seasons added as well.

As for specials: which would they be?

I noticed that the special Movie edition box may be need some expanding given the rising amount of special material based on the original series.
As for the new series, other than the RAH concert performance a few years ago, which specials do you want included in a second 'specials' case?