I replaced a large DMD on a Frankenstein.
It most likely will not be plug and play. The molex connector on the DMD should list what the voltages should be (it's a little white sticker on the top of the connector soldered to the DMD). If you compare those voltages to the molex connector on your old display (again, look for that little white sticker) the voltages will probably be different (I think I had a Cherry display and replaced that with a Babcock).
If your DMD doesn't have the little white sticker on the molex connector, you will have to find the schematics. The old DMD I replaced didn't have the sticker (the new DMD did), but the display came with the schematics and told me what the voltages should be. I know Batman Forever manuals are pretty much non-existent, but the Frankenstein manual should have all the information you need for this. Here is the manual:
Page 21 shows the Babcock display. "P1 Power" shows what you need, 12V, Gnd, Gnd, N/C (Not Connected). I took two pictures to give you an idea of what I did. Looks like I replaced mine with a Babcock display. They are probably the only large plasma DMDs left at this point.