Great question — answering as the UphillTech team:
This is merely observation and some speculation, but I've noticed a few factors: Sometimes the studios wait to release a few similar titles (theme, actor, director) at once. Often in box sets with the films also available individually at the same time or a few months later. Possibly not applicable at least as far as Forsyth is concerned. Sometimes they wait for an anniversary edition. If the film was made 19 years ago, why not wait another year to capitalize on a 20th anniversary edition? As this year is the 40th anniversary of The Day of the Jackal, this doesn't apply unless they're banking on a 50th. Sometimes the studios have a distribution deal, and not exclusive rights, so new deals...
Full answer by Meat Trademark: https://movies.stackexchange.com/a/15930 (CC BY-SA 3.0).
Need it done for your business? UphillTech.
