Hoping they change their minds, or that perhaps they don't lose quite as much money to the post-campaign attrition as usual. If they opened some kind of specific pre-ordering store or kept the paypal open long enough I'm sure they could get that last 200K. It just seems so close for them to completely NOT think about it.
And just a bit of trivia, there WAS actually some kind of BG3 in development at one point, called
"The Black Hound." While it was to have pretty much the same gameplay mechanics as in the preceding games (albeit updated to D&D3E as in IWD2), it was to be more of a spiritual successor, story-wise. It was referred to a long time under the name Project Jefferson, which is in line with the also then in development project Van Buren (aka the original BI-developed Fallout 3). And the similarities don't end there. They were to both use the Aurora Engine, the spiritual successor to the Infinity Engine. But neither project ever saw the light of day, so the engine was never used.