I want to PM Die Hard with a Vengeance at my local Best Buy, but the picture won't match up to the copy they have.

The pic in the Circuit City ad is from the long OOP regular one-disc release from the late 90s.. it's just a stock photo for Vengeance, but the re-release last year (which CC is selling for that price) has the newer look.

If I bring the only copy of DHWAV that Best Buy has, and show them the ad with the different picture (for the OOP version), will I have a problem? Or will they honor it since it's the same movie?

Probably a YMMV situation. Seems like they should but it all depends on your particular store/associate whether they'll put it through for you.

When in doubt, go by the UPC. I've even had customers take pictures with the cell phones to prove a price match.