moving blog posts from old Flash site to new WP site

I have a an old Flash site that has been updated and turned into a WordPress site.

On the old Flash site, there are WordPress blog posts which I would like to keep. How can I have the new site show the old blog posts in the new format? I’m thinking that once I launch the new site, as long as the original /blog folder is there(ie- as long as /blog stays the same) I should be fine..

Can anyone validate this or offer a better idea? Thank you.