Yes, Microsoft is still working on a 'Halo' TV series
 

Remember the Halo live action TV show Microsoft announced way back in 2013? Unlike Spartans that never die, it sure felt like the project's been dead for quite a while. The tech titan told AR12Gaming in an interview, though, that it has never stopped...

https://www.engadget.com/2017/07/22/...alo-tv-series/