What that's doing is overriding the entire Content.cshtml template.
So if you find the original Content.cshtml (from Orchard.Core/Contents/Views) you can copy all the other bits from there (including the @Display comments that render child shapes).
It's best instead of overriding the entire template to just override individual parts of it.
For instance, Parts.Common.Body.cshtml will just override the body area of the post.
You can use the Designer Tools Shape Tracing module to inspect the page and see which bits of the overall shape are rendered by different templates. You can also see which Alternate templates can be used for more specific overrides.