The first episode is going to use costumes and set designs exactly like the Cage. Early in the episode they'll run into Q who is messing with the universe. After being transported to some Arthurian fantasy, they'll tell Q (disguised as Merlin) to knock it off and leave the universe alone. Q will disappear in a flash of light and suddenly the crew will be in the updated uniforms in an updated ship with updated special effects and none of them will notice.
That would be awesome and perfect. Just like they should have just shown Worf without ridges in the TOS Tribbles crossover. Just gives us a wink wink visual gag and proceed like usual.