WP Multisite Plugin development

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Please can someone help me? I would like to develop a plugin for multisite by the help of which site admin can repost the site post into the network homepage. Here site admin can chose a particular category where this post will show, remember this category is a different set of category apart from default post category, this category will use in the network home page for sorting options. Site admin can also promote the post by the help of which a particular post will show in the Feature category area. I am already search some free or premium plugins some WPMUDEV plugins are having some of this feature but this is not what I want.
Can anybody please help me to give some ideas so that I can talk with some developer & start development.