The clear implication at the end of the film is that *something* of Data has remained and in the [tie-in comics][1] to the new 2009 reboot of Star Trek, we learn that when LaForge attempted to install Data's emotion chip into B-4, that was the final trigger needed for Data's memories and personality to override the crude personality of the B-4 android.

![enter image description here][2]  
<sub><sup>*(**Star Trek : Countdown 1 - "The Official Prequel to the Upcoming Motion Picture**")*</sub></sup>

![enter image description here][3]  
<sub><sup>*(**Star Trek : Countdown 2 - "The Official Prequel to the Upcoming Motion Picture**")*</sub></sup>



  [1]: http://en.memory-alpha.org/wiki/Star_Trek:_Countdown
  [2]: https://i.sstatic.net/PExwA.png
  [3]: https://i.sstatic.net/cZn2A.png