343 Industries Teasered “something new” for the Halo: The Master Chief Collection this week.

On Twitter you posted a picture with an ODST soldier who fights against the flood.

We also used the picture for this article.
It seems like the Halo: The Master Chief Collection this week would receive the cooperatively playable Flood Firefight mode.
The mode known from the parts Halo 3: Odst and Halo Reach, the Covenant actually presents you as enemies, but it seems like the Flood now mixed.
In addition, Halo Infinite players can look forward to Season 2: Lone Wolves, which was announced with a trailer for May 3.