By far the best thing to do with regards to the SERPS for your hub is to write a 500+ word article that is unique and then sending some links to it.
Adding a news capsule won't help as much as good unique content because the news is likely indexed on hundreds or thousands of other pages on the internet.
One other thing that will help is to link to other related hubs and then let the hubber know that you liked their hub and linked to it from one of your own. Often times they will check out your hubs just to see who is linking to them (especially if they don't already have a lot of followers.) if you have quality content they are more likely to link back to you since your hubs are related, giving you a boost in the SERPS.