Titles...hmmm....the title should reflect that this is an ending of the series. Slightly somber, perhaps, especially considering that the viewer likely knows that Sellers died during the production of the film you're deriving this stuff from.

A Shot in the Pink (sounds like porn...)
Fade to Pink
The End of the Trail

Ya know, considering this wrap-up piece is a reworking of "Trail of the Pink Panther," where you're taking it and making something new of it, why not:
"The Trail Not Taken"--A reference to the poem, "The Road Not Taken".