Agreed with TCTTS above, that it a pretty rapid turnaround.
They must have put Part 1 & 2 production timing, contract work, and script etc. all into a plan that was:
Part 1 - Certain
Option Part 2 - everything to be done pre-filming; and company will exercise continuation option based on performance of Part 1
Everyone committed to Part 1 and the Option for Part 2 as a contingency of success.
They got the green light now, and they can begin as soon as practicable.
They must have put Part 1 & 2 production timing, contract work, and script etc. all into a plan that was:
Part 1 - Certain
Option Part 2 - everything to be done pre-filming; and company will exercise continuation option based on performance of Part 1
Everyone committed to Part 1 and the Option for Part 2 as a contingency of success.
They got the green light now, and they can begin as soon as practicable.