How does this affect the war?
Does it still end in April 1865?
Does it drag on longer?
Does it end sooner?
How does it end?
Is President Abraham Lincoln still assassinated?
How does society cope with zombies?
How does the contagion spread?
What is the method of transmission?
Where did it start?
Do the characters know how it started?
Did any of them witness the beginning?
What kind of relationships develop between characters?
How do characters meet in this universe?
Do the same relationships still form?
If so, do they happen at the same time?
How do the characters react to the zombie apocalypse?
How does it change them from the canon versions?