Yeah, Disney BD/DVD combo packs include the first disc of the most recent DVD release of the movie so whether or not it has special features depends on that DVD release. And as for non combo packs including bonus DVDs for special features, it just seems to be a way to cut costs used by some studios. The upcoming blu-ray release of LOTR is an example of that.
Originally Posted by Michael24
Pertaining to combo packs in general Penguin, it varies. You get the movie on both a blu-ray disc and a DVD but the vast majority if not all the special features are on the blu-ray. Whether or not the DVD includes any bonuses all depends on the studio or the individual release. In the case of Sherlock Holmes it would seem that the DVD included in the combo pack is bare-bones. If the single DVD release has any special features and you don't have plans for getting a blu-ray player, then perhaps it is your best bet.
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