Currently, we are separately crafting email blasts and blog posts with the same content. It would save us so much effort if we could simultaneously create an email blast and blog post. At least, it would be great to have a button to click to turn one into the other or start a draft using the same html.
This isn’t something that we have planned at the moment - you can always copy the HTML or the content from the email into a blog post.
There is also a suggestion for 'giving the option to view an email online' which isn't exactly the same but similar so you might want to follow that one too as well for updates!