I don't think anyone can pull off remakes of those two classics, but remasters using the Divinity 4.0 engine would be interesting.
# Rule nr. 1:
- Don't mess about with any of the sound (voice acting, music, ambient, etc.). Use the original assets.
# Rule nr.2:
- Do not alter the main storyline or other events to fit with whatever.
# Rule nr.3:
- MUST remain RTWP.
Whether or not it should use the new rulesets or not can be up for debate.
The most important part you missed is 'Must remain DnD 2e'.