It looks like Astro Boy (known as Tetsuwan Atom, the Mighty Atom in Japan) may be getting a new animated television series. A poster has made an appearance on the internet for "Astro Boy Reboot" which advertised as a new animated series running 26 episodes at 26 minutes per episode.
Not much else has been revealed about this project though the poster does have the Tezuka Productions logo on it (the legendary manga-ka Osamu Tezuka is the created Astro Boy in 1952), and also the logo for the animation production company Shibuya Productions who tweeted it out. Shibuya Productions is related to Shibuya International which has the distribution rights to Astro Boy in the French-speaking parts of Europe.
Astro Boy, originally animated in 1963, hasn't had an animated series on television since the 2003 reimagining. 2009 saw an IMAGI movie claiming to be Astro Boy. Let's just say we haven't seen Astro Boy in any major way in the USA since the 2003 Astro Boy series aired on both Kids WB! and Toonami in 2004. No word yet if this new series will show in the USA or the timeframe for it's distribution.
Here's the poster again, without the Twitter frame: