This main page would obviously include links to the main Solar Orbiter Cosmos site at https://www.cosmos.esa.int/web/solar-orbiter and the SOAR page at http://soar.esac.esa.int/soar/ and backlinks provided from there to here.

SOAR TAP instructions - very (very) similar to instructions for CSA given at https://www.cosmos.esa.int/web/csa-guide/home (which have already been reused for other archives) - these instructions would update and replace those given in http://soar.esac.esa.int/soar/#aio (which requires a SOAR release in order to be updated) and https://issues.cosmos.esa.int/solarorbiterwiki/display/SOSP/SOAR+%28Solar+Orbiter+Archive%29+-+How+to+Use (a more 'document' (i.e., pdf) version could be provided here if thought necessary, although personally I'd rather not).

The CSA User Manual page (above) is planned to include basic user manual for the web interface but this has not yet been completed. This could also be done for the SOAR web interface here.

Much more sophisticated version of https://issues.cosmos.esa.int/solarorbiterwiki/display/SOSP/Archive+Support+Data, with perhaps a tab per instrument, which could then include much more information on Data Releases, usage guidelines, etc, as requested by at least Jim Raines for SWA and the MAG team. This could also include links to external tools, such as exist for STIX.

In addition, links to pages on the Public Confluence pages could be provided with more information about what/why/etc.

While the science and instrument data would be kept to the existing Solar Orbiter Cosmos site, this site would be more focused on the data and how to get it, and even how to use it - links to Jupyter Notebooks, summer school material, DataLabs, etc. 

DOIs: https://www.cosmos.esa.int/web/esdc/doi/solarorbiter

This would also be a good place for SOAR Release Notes and known issues.