Yeah, the base is certainly lacking in creativity. While I don't care much about bases (I'd prefer the standard MMS base with name and '89 myself) I think they should improve what they're giving us.
Make it a unique, '89 Batman themed, base. There's plenty they could do with it to make it stand out. Look at the New Goblin base, Bruce Lee's, Iron Man, Luke etc.
The TDK bases fit with those figures because they were 1/6 representations of the actual display cases that WB uses to display the suits at cons, stores, etc. It made sense and looked cool. Here just having a black square cut doesn't cut it. I hope they have the '89 logo sculpted on there somewhere as it seems logical. Hell, the TDK logo is on the base now that I think of it and DCD even utilized the '89 logos for their busts and statues.
I'm thinking these are stand ins any way.