Long story short (feel free the improve this descriptions): there have been many discussions about creating a [[ https://www.mediawiki.org/wiki/Requests_for_comment/MediaWiki_Foundation | MediaWiki Foundation ]] or a similar kind of MediaWiki-centric organization focusing on 2rd party, non-Wikimedia use cases. The offerts are today being driven by the [[ https://www.mediawiki.org/wiki/MediaWiki_Stakeholders%27_Group | MediaWiki Stakeholders Group ]].
At the #wikimedia-developer-summit-2016 , there were discussions about defining finally an implementable plan. The (reliably unofficial) position of the Wikimedia Foundation is that we will not drive that effort ourselves, but it is possible to discuss whether we would support it in some form. The first step for such conversation is a proposal from the promoters of the new group, explaining what they request from the WMF.
The Technical Collaboration team is working on their slice of the WMF Annual Plan. Now it is the time to request budget for planned activities. Therefore, it is a good time to ask if these promoters need support from the WMF during FY 2016-17, and which kind of support exactly.
Note that while this is the first stop to request funds/support for the next fiscal year, it is not the last. If this doesn't work now, there might be other chances through the different Grants programs of the WMF.
Note also that the Technical Collaboration team is working on its own draft of the annual plan, which is subject to criticism, negotiation, cuts... within the WMF and as part of the Funds Dissemination Committee review process. Having a proposal included in our draft plan will not be a guarantee for anything until the plan is approved.