If your article is an opinion article about the future of blockchain there's several routes you could take:

- The reach of the technology, all the different industries it can influence (currency, assets, data, etc.)
- Browse through the different ICOs and see what new tech they're bringing into the game
- Try to understand how industries are changing, why is it beneficial for them to move to a blockchain

That should be plenty for you to start brainstorming, and please comment the link here when you've finished writing it