Although Wizards of the Coast won't bring back all the gods from the original Theros block (2013-2014) in the new Magic: The Gathering set Theros Beyond Death, we do know that they're bringing back the five mono-colored gods from the Theros set plus two multicolored god cards, Klothys and Athreos.
Today, Sean Plott (Day9) has revealed "Heliod, Sun Crowned", a three-to-cast white legendary enchantment god that lets you put a +1+1 counter on a creature or enchantment whenever you gain life. The new Heliod can also give any creature lifelink. Its 5/5 body is solid but you need to have five white devotion for it to become a creature.
WotC and other members of the MTG community have also shared other cards from the upcoming set recently, including new rare creatures, enchantments (one of them does exactly the same thing as one of the playtest cards from the Mystery Booster), and other spells. Check out the Theros Beyond Death cards revealed today:
Devourer of Memory
Aphemia, the Cacophany
|Legendary Enchantment Creature - Harpy|
|Flying\n \n At the beginning of your end step, you may exile an enchantment card from your graveyard. If you do, create a 2/2 black Zombie creature token.|
Cling to Dust
One With The Stars
|Enchantment - Aura|
|Enchant creature or enchantment\n Enchanted permanent is an enchantment and loses all other card types. (It still has abilities, but it is no longer a creature.)|
|Prevent all combat damage this turn that would be dealt this turn except combat damage that would be dealt by enchantment creatures and enchanted creatures. Scry 2.|
When Banishing Light enters the battlefield, exile target nonland permanent an opponent controls until Banishing Light leaves the battlefield. (That permanent returns under its owner's control.)
Atris, Oracle of Half-Truths
Theros Beyond Death, the 83rd Magic: The Gathering expansion, is set to release on January 24, 2020. Prerelease events will take place on January 17-19.