Larian Studios Forums Baldur's Gate III Baldur's Gate III - General Gale's New Bio - Heavy spoilers even for EA Players

Here's my theory:

Gale will begin to uncover the secrets of the Netherese orb. When Gale finally manages, after many difficulties, to get in control of the orb, then Gale will ascend to divinity. Maybe a demi-god or some such, with a name change, of course.

At which point Mystra will appear before him and let him know that she only cursed him with that orb so that he could learn to control it and become a god and that way the two of them can be together forever. Lady Mystra and Lord Myster, custodians of the eternal weave.