I would steer away from using "news" at all. Try simply "Latest" as the title. Or, if you have some statistical engine that makes popular or trending topics bubble to the top, use "Trending" or "Popular."
The content of that section may include "proper" journalistic news, but it may also contain a blog post, tweet or other social update. We as Web users understand what this content is. However, we may not understand if it's relevant, recent or read-worthy. The fact that it is "short" in length is only an enticement to click on it. It functions as a "ticker tape" containing headlines (but I wouldn't use that word, either). The shortness or flash-ness of the content doesn't add any meaning or purpose.
I would avoid using "short." I don't think it will convey any meaning to English speakers (such as myself). Definitely avoid "Shortly" which has idiomatic consequences unrelated to news. "News" is also a worn-out term. Anecdotal-ly, "News" leads people to think of newspaper and television. People are less interested in "news" and more interested in "connection"