MASSIVE SPOILERS:
In an interview posted on the subreddit, Swen mentions that Dark Urge offers the most evil way to play and that you can become an evil god. With full divine powers.
When we combine this information with:
-The fact that we see Dark Urge in Bhaal's symbol in the trailer.
-We see Dark Urge become the Slayer
-We know the Slayer is either the form of Bhall himself or Bhallspawn
-We know Bhaal just wants to kill and bring forth bloodshed from living creatures
-We know Blood in Baldur's Gate occurs before Bhaal's return and that Bhaal is not a full god, but a quasi-divine being, whose murderer (Cyric) still has divinity...
It seems pretty clear to me that The Dark Urge is Bhall, an Avatar of Bhaal, or an Incarnation/Manifestation of Bhaal, or a descendant of a Bhaalspawn (The Kid?). Perhaps the Goblin-like creature is either Bhaal actually or his Imp Butler Cespenar
No when Bhaal and Myrkul came back, along with most other returning Gods, its was as Gods straight up.
It was only when they decided to walk among mortal that AOs new rule kicked in, they had to do it as demigods, at least until they decide to go back to the Outer Planes like Auril eventually does. This rule applied to the Mulhorandi Gods who rule Muholrand and Gilgream who rules returned Unther. Only exception to returning Gods being Gods is Nanna-Sin who traded his Godhood to Asmodeus in exchange for
Nanna Sin's resurrection and spitting out Azuth, in a deal brokered by the Brimstone & the Untheric God Enlil who after having left Faerun millenia ago, returned during the Sundering with the help of a Dragonborn.
The dead three got MtG cards in Commander: Legends Battle For Baldur's Gate, although really only Mykrul's card is any good.
