While the Framework specification does require that markup languages combined to create conforming documents be profiled following strict rules, there is no requirement that the profiles thus used superset one or more of the WICD profiles. It may be preferable to do so for purposes of compatibility and interoperability with web applications, but to repeat, that is not required.
In fact, virtually any plain text-based markup language that can be profiled can be used within the structure of the Framework. But more importantly, a combination of cutting edge W3C markup language versions such as XHTML 2.0, CSS 3.0, XForms, SVG, etc. can, with only trivial extensions, serve as the full-featured metalanguage superset every expert who has spoken to the subject agrees is necessary to convert between ODF and OOXML with high fidelity.
