SilverWook said:

One could put a few frames of Borg imagery into Spock's mindmeld with V'Ger?

A lovely idea, maybe only 1 frame even, just as a treat to us.

I saw the Enterprise episode "Unexpected" on SciFi today, and there is a nice Klingon D7 lookalike in it. The engine nacelles have a blue glow though.

That's the problem with using any of the shots from TUD or "Flashback". After TMP, all of the Klingon cruisers have glowing engines.

Here is another crazy idea I had last night. Decker should have some personal effects in the captain's quarters to make them look less sterile. (Presuming Kirk gets them temporarily, and Decker has not had time to remove anything yet.) A picture of his father, the late Commodore Decker, would be a nice touch.

Matt Decker doesn't look his best in "The Doomsday Machine", but maybe a headshot of clean shaven, happy William Windom could be put into a TOS uniform?

That is a crazy idea, but it just might work. I'm sure we can make Commodore Decker, therefore making the connection canon! I've always wanted to do one of those fake family photos you see in movies....