Any idea if these are going to be added to the site?

If you're talking about the ones from this year, I'm sure they will be soon. If you're talking about previous years, they already are..in the Media Promos set.

could not find last years

https://deckbox.org/mtg/Jace%2C%20the%20Living%20Guildpact?printing=25217
https://deckbox.org/mtg/Ajani%20Steadfast?printing=25218
https://deckbox.org/mtg/Liliana%20Vess?printing=25219
https://deckbox.org/mtg/Chandra%2C%20Pyromaster?printing=25220
https://deckbox.org/mtg/Nissa%2C%20Worldwaker?printing=25221
https://deckbox.org/mtg/Garruk%2C%20Apex%20Predator?printing=25222


https://deckbox.org/editions/164-media-inserts
2013 are #s 72-76
2014 are #s 87-92