So Kevin Franklin, Former Multiplayer Design Director on Halo 5: Guardians had announced on Twitter that he and two others from 343 Industries left to create their own studio “First Strike Games”
https://twitter.com/kevin_franklin/status/708075933203193856
The other two developers are Doug Barnes and Brian Lemon. From what we see on their website isn’t much besides that this game will indeed be a very well developed Multiplayer game for PC and Consoles. Maybe a first person shooter? Who knows, I am excited for these guys’ adventure and I am sure this game will be great.