The Halo 3 Anniversary rumour has been put to rest by 343i’s community manager.
Brian Jarrard (known as sk7ch343 on Reddit) posted a response to a user about speculation for Halo 3 Anniversary edition. He commented: “OMG stop. There is no Halo 3 Anniversary.”
We already know that Halo 6 won’t be at E3. I wonder if we will see another Halo release this year after Halo Wars 2 (and definitive edition) released earlier in the year.
For now, Halo 3 in the Master Chief Collection is available on Xbox One if you’d like to revisit Halo 3.