Bingo, I think you may be on to something here and I like the idea of the mobile palace, as long as it doesn't look to un-Star Wars related.

The question is what are you going to do with the shuttle landing sequence and the Vader-Palps conversation? Will this palace attach somehow to the DS, or will it land in the hanger?

I think it would be cool to have that conversation over hologram, then when it is over, show Palps walking out of his Palace mysteriously (like at the end of ROTS on Polis Massa). Mabey have it be storming? Then show him dock the mobile Palace.

Mabey all the Coruscant business isn't needed, but I agree that if you would rather have the mobile palace, then showing where it came from would make alot of sense.