Custom WordPress Plugin Development (Based on one Existing Plugin)

Need to develop a custom Wordpress plugin which is based on one existing WordPress plugin. The concept of the existing and to-be developed plugin is almost same. The existing one shows "recent posts" while the to-be-developed one will show both "recent posts" and "related posts", depending on the landing page )home/category/post/search). The CSS in the new one has to be different and look classy. Again, the way posts appear in that section needs to be modified (using CSS). I believe it will be an easier task as you already have the existing plugin to take inspiration and see coding structure. If we take you for this, you have to sign a NDA and you will be legally bind not to tell anyone that you have developed this plugin. You can neither take credits, repackage the plugin, or sell it anywhere. And yes, it's just the beginning. We will be posting 2/3 jibs here every month! We will definitely prefer working with you again if everything goes well. Please reply by adding "Cool" as the first word of your sentence.