Microsoft has told Eurogamer that Primetime will not be a part of the New Xbox Experience on 19th November. Other features may also be absent, although there's no word on which ones they might be.
"The New Xbox Experience is a long-term initiative, and what we are rolling out on November 19th is only the beginning," a spokesperson told us.
"With the New Xbox Experience we will have the flexibility to roll out features and updates dynamically, unlike in the past where we were on a more biannual schedule. So, there are a lot more exciting features, including Primetime, that will be coming soon."
Early estimates put the exciting Primetime feature as a spring 2009 release, according to Forbes.
Xbox Live Primetime was unveiled back at E3, and aims to provide a meeting ground between gaming and TV.
Microsoft, initially, will use quiz games to achieve this; Endemol's 1 vs 100 telly show will be adapted into a massively-multiplayer online event for the Xbox Live community.
Players dressed as Xbox 360 avatars will assume the role of host, contestant and audience, and join regular, scheduled main events on the service - as if sitting down to watch a quiz show on telly each evening.
The potential is enormous, and John Schappert has promised this will be a European venture, too.