For those who do not know, in 1999 Philip Athans wrote a novel based on the Baldur's Gate story, and CHARNAME is named Abdel Adrian: https://forgottenrealms.fandom.com/wiki/Abdel_Adrian
This novelization was poorly received because:
1) rather dull and uninspiring main character;
2) completely ignoring many established facts within the videogames (i.e. Adrian is not a naive young dweller of Candlekeep who flees and discover the rest of the world for the first time, he's an already seasoned warrior who became a mercenary as a teenager) and altering the personality of characters or even their appearance (i.e. Minsc is not our beloved huge crazy bald ranger, he has long red hair, he's no longer a warrior and he's smaller than Adrian);
3) introducing fixed unpopular canonical events, ignoring the free choices from the videogames (i.e. Adrian is a chaotic neutral fighter, what side he tooks in Athkatla, what choice he makes at the end of ToB etc.);
4) many of these choices are really bad and poorly written (i.e. what happens to Imoen and Jaheira and what they do);
5) randomly killing popular characters and throwing them away as they didn't matter.
Unfortunately, since Wizard of the Coast requires standard canons for its settings, these novels are regarded as canon in the Forgotten Realms lore and official campaigns set after 1369DR will necessarily take them into account. Thus Murder in Baldur's Gate is based upon the ultimate fate of Adrian, for example.
However, the videogames of Baldur's Gate tell our personal stories of CHARNAME, not Adrian's tales.
I hope that Baldur's Gate III won't reference at all Abdel Adrian, but rather mantain obscure and unknown the fate of Charname.
What kind of Bhaalspawn was he? Some say he or she was a powerhungry brawler, other a wise diviner, other a force of balance in nature, or rather an opportunist rogue. Some say he or she was a human, an half-elf or an half-orc. Some bards sing that he or she rescued a keep in Amn and protected its mage princess from a douchebag pretender, but some bartenders say that he or she instead usurped that keep and ruled with cruelty.
Nobody knows. All we know he's called the Stig.
What did he ultimately do? Some people say he rejected his divine power and spent the rest of his years alone in Candlekeep, other people say that instead she went abroad travelling to the most distant corners of Faerun, some bards sing that he took a fake identity and became one of the dukes of Baldur's Gate before being murdered, other ones tell that she ascended to divinity as a mysterious goddess and then vanished, and so on... nobody really knows.
Only players might know.
I would be rather disappointed to know that everything I did in Baldur's Gate is erased because of a quite bad novel written after the original game was created.