Unverified60% confidenceFactExact time
The Neptune project was ultimately cancelled, and its team was merged into the development team for the successor to Windows 2000, codenamed Odyssey.
2
Sources
60%
Confidence
Long-term
Relevance
10/4/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedMicrosoft originally planned to release a system codenamed Neptune, built on the NT kernel and scheduled for March 2000, but it was cancelled because it could not be delivered on time.64% similarUnverifiedMicrosoft's original codename for the next-generation consumer Windows was Neptune, built on the NT kernel.50% similar
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