I start with my characters and where I want to take them. Then I figure out the conflict that needs to be there to drive the character growth and change I want. What are my character turns and story value changes to use Robert McKee's terminology.
I figure out my story beginning and end, get a sense of the tentpoles for the middle to determine how many parts I want for the arc or if it is a standalone.
I do the same for the larger story, currently I have about 25-30 issues tentpoled for BoM before I scripted the first issue. 3-4 major arcs plus several standalones between arcs. A lot of that will change as I write each issue, but I want a sense of what I am writing towards. There will also be logistical changes as characters I want to claim later may not be available or other titles may introduce continuity I have to accommodate, but I want at least a direction and a plan moving forward.
Then I begin to break down the first part into beats and build up my scenes.
That's when I start thinking in terms of comics. A typical comic is now 20 pages, so I look at my scenes and imagine what the page layout for a comic would be-how many comic pages for this scenes, then for that scenes etc. Do I have 20 comic pages of story? If I have too much, what can I cut or move to another issue? If I have too little, what can I add or expand?
When I feel like I have a good sense of what the issue will have I forget all about my 20 pages visuals and begin to script the issue, writing out the scenes and roughing out the dialogue. I forget about visuals here because I don't have any. I write the scene in prose making sure everything the reader needs is there, engaging as many senses as I can-what is seen? heard? smelt? felt? etc. There are no visual shortcuts to the story telling, so I make sure everything is there for the scene to be complete and come alive for the character.
Then I do a second pass on dialogue. I try to capture the feel and pacing of what dialogue would be like in a comics page. No more than 25-30 words per balloon is the standard I think, so I make sure that my dialogue fits that pattern. If I need longer bits, I try to intersperse it with descriptions of body language, reactions, description, etc. to keep the feel of comic dialogue.
Once I have that done, my first draft is done, but I am not. I do a grammar, spelling, usage, typo edit.
Then I put it aside for at least a day, read, write something else, whatever.
Then I do a second pass on the entire thing. Does each scene accomplish the character goal or story value goal I set for it. Does each character have a distinctive voice in dialogue, thought, body language, etc. Did I miss anything that needed to be there? Did I include anything that didn't need to be there. Take my first draft and develop it into something better.
Then I do another round of grammar, spelling, typo type edits for all the changes I made, put it away again.
Come back a day or two later, reread, give it a final polish, and a final copy edit. Then post and hope I didn't miss any typos, spellings, etc.
Sometimes I have scripted scenes form upcoming issues as I am writing the current issue. The scene in BoM #1 between Zee and Madame Xanadu was the beginning of a conversation, that I wanted to see through, so I have rough scripted the continuation that will appear in issue #2 before I finished #1. There's a scene in #5 I saw so clearly I had to write it before I forgot it, so that scene is scripted already and waiting for me when I get there. Of course, things could change before #5, but I have a foundation ready when I use that scene.
It may seem excessive, but then I went through 85 drafts of my master's thesis before my adviser found it acceptable, so I don't find three-four drafts to be excessive at all
-M