There are too many similar projects,STEEM,CreaiveChain and so on.
Currently, there are no projects (at least, using the blockchain) that are concerned with addressing the issues surrounding the creation and curation of news, in the way DNN does.
Steem for example, allows anyone to post/publish content to its platform, regardless of the type of content. For publishing content, Steem then rewards its users with STEEM granted, their content gains popularity, while at the same time, incentivizing dialogue around this content. Other than subjective mining, DNN bears little resemblance to Steem. The best way to think of Steem, is it is a tokenized Reddit on the blockchain. Rather, than reward users with Karma, users of Steem are given STEEM. In turn, creating a platform that fosters content deemed as quality by the community.
CreativeChain on the other hand, is focused with authorship assurance and creating customizable distribution channels for content. While CreativeChain does have the ability to create smart contracts and social networks to interact with communities, there is no clear-cut solution to addressing the problems surrounding news in particular. DNN and CreativeChain's incentive models are also vastly different.
DNN can be viewed as a publication on the blockchain. DNN's aims to enable a continuous feed of source-based news that is concise and community vetted for factual integrity.