From Wiki:
Morrison has become more involved in screenwriting and has written numerous scripts and treatments.
 His screenplays include 
Sleepless Knights for DreamWorks and 
WE3 for New Line (both in development with 
Don Murphy producing, 
John Stevenson is attached as Director for 
WE3). Most recently he wrote the adaptation of the video game 
Area 51 home console game
[43] for Paramount (in development with 
CFP Productions producing). Morrison has written a film to be directed by 
Adam Egypt Mortimer called 
Sinatoro, to be released in 2012.
[44][45] He is working on another screenplay called 
Dinosaurs vs Aliens for 
Sam Worthington's  production company Full Clip Production and when that is done he has  said he will be working with them again on a screenplay based on the 
2000 AD story 
Rogue Trooper.
[46]
 He has pitched a science fiction television series entitled 
Bonnyroad to the 
BBC with director 
Paul McGuigan and 
Stephen Fry, which is currently in development.
[47]
 Morrison provided outline story and script work for two video games (
Predator: Concrete Jungle and 
Battlestar Galactica) both by 
Vivendi Universal, though the finished products often did not contain all his contributions.
 He has also been a successful playwright, with two plays written for and performed by Oxygen House at the 
Edinburgh Fringe. The first was 
Red King Rising in 1989, about the (partly fictional) relationship between 
Lewis Carroll and 
Alice Liddell and the second in 1990, 
Depravity about 
Aleister Crowley. Both plays were critically acclaimed and won between them a 
Fringe First Award, the 
Independent Theatre Award for 1989 and the 
Evening Standard Award for New Drama. A film adaptation of 
Red King Rising is in discussion. Both plays were included in his collection of prose, 
Lovely Biscuits released in 1999.
[48]