Many thanks to "Fujiko Lover" for the new forum banner!
ANN review which implies the final film in a 'trilogy'. https://www.animenewsnetwork.com/review/lupin-the-iiird/mine-fujiko-no-uso/.148376 I wonder if that mean that Koike chose not to do it without Monkey Punch, if that's true, or that the demand for it in theaters wasn't high enough to opt for that style. I know I said TMS can do the 'Bond thing without the Bond author', too, but perhaps I'm mistaken? Hope not.