What I want to know is will it be larger and more in depth than Baldurs gate 2.
Its so hard to evaluate DOS2 / BG3 length because they have turn base combat. It slows game to a grind. This makes the games artificially <LONGER>. Even small insignificant battles can take awhile.
If the first Irenicus dungeon in BG2 were turn base, would probably take a couple of hours to complete instead of 40 minutes...
BG2 is SO significantly inferior technology-wise to what they're doing now with BG3. For the amount of effort that it would take to make like an hour's worth of content in BG3, it would probably equal to a few minutes of content in BG3.