I've been holding off on opening up my Lt. Gordon and DX2 Joker. Wasn't sure if I was going to keep them or sell them. Since I have pretty much ran out of space, I am going through all my collection. But I decided to keep all my Hot Toys Batman (the few I have) and display them in a Detolf.
I did have a problem with Lt. Gordon as the embroidered patch was coming off. I peeled off two orange-brown glue layers off the back of the patch. I used some flexible adhesive from Loctite and a disposable microbrush and brushed on the glue on the back of the patch and reapplied it. It looks better than it did out of the box.
I have the Joker set of playing cards from DC, but they are crap paper. I scanned them in and cut my own cards out out of photo paper. I chose a few cards to go along with the display and taped them to the glass.