Hi, all. This is a question specifically for those authors who post here, particularly those for whom Star Trek is not the only franchise for which they write or have written tie-in media of any sort:
What are some general 'rules' regarding tie-in media that you've found to be universal?
Note: I'm asking this question due to an ongoing discussion on the message boards of The Force.Net concerning what could potentially happen to the existing media of the Star Wars 'Expanded Universe' - the majority of which takes place in the years after Return of the Jedi - now that we know that the Sequel Trilogy is coming and will be covering that same time period, and would like to be able to offer some specifics concerning how writing tie-in media generally works.
Thanks in advance for any replies that I get, BTW.