We are missing tokens in the database from the following sets:
Origins
http://magic.wizards.com/en/articles/archive/arcana/tokens-origins-2015-07-01
Battle for Zendikar
http://magic.wizards.com/en/articles/archive/arcana/tokens-battle-zendikar-2015-09-16
Commander 2015
http://magic.wizards.com/en/articles/archive/arcana/tokens-commander-2015-edition-2015-11-05
Oath of the Gatewatch
http://magic.wizards.com/en/articles/archive/daily-magic-update/daily-magic-update-2016-01-11
Shadows Over Innistrad
http://magic.wizards.com/en/articles/archive/card-preview/tokens-shadows-over-innistrad-2016-03-22
I like the convention of including tokens in the base edition like you've done with the last few Duel Decks (DDP and DDQ). Please do this for other sets as well.