Yeah right. Here's a little glimpse into a possible future if they ever decided to make BG3.
"Hey guys, it's Trent. So we have finally decided on the rule system for BG3 and I know you all asked us to use D&D, which is of course an obvious choice, but.... (and don't bash us yet, read till the end!) after a lot of heated discussion, we decided to move to another system, because it's a) easier to understand for iphone players b) more balanced c) will allow us to create more content, because frankly D&D is very limiting! And believe me, it'll only make the game better. If I thought it would spoil the BG experience, I wouldn't even think about it, trust me, I'm a hardcore BG2 fan myself. So... without further ado, it's the...... DA2 system!"
Now here's the glimpse into the actual future concerning BG3:
Kickstarter in 20 years by aging Brian.