Creating new StructuredText-like content type for Zope/Plone

[pugnatio]

I prefer to use my own text format instead of StructuredText or the
like, because I also use emacs outline mode a lot.

What would be the best approach for creating this new content type in
Zope/Plone? Writing a new Plone product with page templates seems
fairly involved, but maybe it's desirable to have that control.

Would Archetypes suffice?

Thanks in advance,

--tobias