There might be a fifth warriors series called New Reign and the possible title for the first book is Chasing Stars It will center around Lionblaze and Hollyleafs kits?

Yes there is going to be fifth warriors series, although I'm not sure about Hollyleaf because she dies in warriors power of three sunrise. I've heard a rumor that it will be about how the clans decide they don't like living together so they disperse. If there is a fifth warriors series, then it will be the last one.

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Ok, this is someone else, but there will be a 5th series, which was confirmed in August 2010, about the clan's early days.