I think I have heard from a different message board that people would also like a endless predator room possibly if your detected it ends - although it'd have to be absolutely gigantic (larger than the inside of the TARDIS?)
Different point when using the sonic batarang after it's used, thug comes get's taken out (inverted takedown?) the batarang still shows the circle going in and out that seems redundant and or the thugs make no more mention of "one of batamans toys, he's here!" . . .