A successor called Windows Codename Triton was mistaken as a service pack, but as shown in Antitrust documents, it was actually a successor to Neptune which would bring minor updates and enhancements.
The following planned release dates come from PX07297.
- RTM: March 2000
- SP1: May 2000
- SP2: September 2000
- SP3: January 2001
- SP4: July 2001
- SP5: March 2002
Other Neptune SKUs
Microsoft Anti-trust documents from Neptune era indicate that Neptune was to have not only one, but several editions, namely "Entry-Level", "Standard" and "High-End", which could translate into these modern SKUs: "Starter", "Home" and "Professional / Server". It is unknown what these editions would actually become, if Neptune was ever released.
There are also several strings in file USETUP.EXE from Neptune build 5111.1 that clearly mention "Neptune Server". These references could be leftovers from Windows 2000, if all "2000" strings were simply replaced with "Neptune" during the rebranding process.
NOTE: some of the information provided in this timeline is based only on rumours or unconfirmed build numbers. Therefore, this timeline can not be taken as a reliable source of information.
- Early July 1999: Neptune build 5.50.5022.1 is compiled
- Around 1999-09-20: Neptune build 5.50.5067.1 is compiled
- Around 1999-10-26: Neptune build 5.50.5086.1 is compiled
- Around 1999-11-08: Neptune build 5.50.5095.1 is compiled
- Around 1999-11-17: Neptune build 5.50.5099.1 is compiled
- Early December 1999: Microsoft announced the details of Windows Neptune to a few testers
- 1999-12-10: Neptune build 5.50.5111.1 is compiled
- Mid-December 1999: Neptune builds 5.50.5116.1 and 5.50.5117.1 are compiled
- 1999-12-27: Neptune build 5.50.5111.1 is sent to selected testers
- 2000-01-21: Paul Thurrott reveals that both Neptune and Odyssey are cancelled and will be replaced by Whister.
- 2000-03-20: Windows Whistler build 2211.main.000309-1512 leaks, though it looks a lot like Neptune it's an entirely new project