- D2-ED - complete, though a bit long
- D2:ED - same
- D2ED - slightly shorter...
- DED - would be better for a zombie / vampire game, IMO
- D2 - conflicts with another game
- DII - roman numerals are out of place, and (depending on font) looks like dll
- DD2 - forget the new name, just stick with the old abbreviation
- ED - short, consistent with DD / BD abbreviations
I was going to add a poll, but it seems they have not been enabled in the new forum software. Therefore, I'm just going to keep using ED and wait for everyone else to get lazy enough to do the same.
