You're optimistic!
On a more serious note, at
their current rate of progress (six months to complete ~25% of this list) I'd say another 12-18 months of work would be needed to turn Bannerlord into a finished game and good sequel. So, I'd say TW could accomplish that by late 2022-early 2023.
At least the recent two patches combined had some nice content. As long as every patch has significant new content and/or major fixes I don't mind if they need to push back release dates.