For Baldur's Gate III on the PC, a GameFAQs message board topic titled "Apparently there was an AMA on reddit today. Obviously in Baldur's Gate 3 these would be completely different because the story and setting is radically different. I figure that a free demo of a turn-based, CRPG using the SRD 5.1 ruleset might be useful for people want to get a feel for how BG3 might play without spending money on the BG3 early access.The demo is meant to be available tomorrow.
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But with the amount of races and sub races you can do something like this could open up a lot more interest in picking out different options and replayability imo.

Baldur’s Gate 3: Larian Studios Boss Discusses Characters, Links With BG 1 & 2, Early Access & More.