This months issue of V-Jump (May 2010 issue) contained quite a bit of Dragon Ball news. In the anime portion of the magazine they unveiled the final Dragon Ball Kai episode titles of the epic Goku vs Freeza battle, which indicates Planet Namek will explode in episode 53 of Kai. Assuming they skip the Garlic Jr. filler arc, it is likely we’ll see Future Trunks make his debut in episode 55 after the Z-Warriors are all wished back to life and the Namekians find a new home.

Episode 052 – April 11, 2010
「消えゆく星に残った２人！これが最終決戦だ」
“Two Remain on a Vanishing Planet! This is the Final Showdown”

Episode 053 – April 18, 2010
「孫悟空、最後の一撃…ナメック星宇宙に散る」
“Son Goku’s Final Blow… Planet Namek Scatters Throughout Space”