As detailed in the report, the mode is seemingly codenamed "Tanaka," and is being viewed as something that should appeal to a wider audience of gamers.
"It seems that this new mode codenamed 'Tatanka' could be several months out at this point," Windows Central reports, "and is designed to be a more 'newcomer-friendly' experience that isn't as demanding competitively than existing multiplayer modes, Big Team Battle and Arena. It's also intended to entice users who typically aren't interested in Halo, potentially targeting gamers on Fortnite, Call of Duty: Warzone, or Apex Legends."
According to Windows Central, the mode will also "hook into Halo Infinite's upcoming Forge mode," feature "player-created content" in addition to cosmetics from Halo Infinite's existing multiplayer mode, and potentially have a "new progression system of its own."
Being that the project is being worked on by a studio entirely separate from 343 Industries, it certainly seems like this new mode will hold some significant weight in Halo Infinite.
Certain Affinity, an independent game developer based in Texas especially known for its work on Microsoft titles from Halo 2 to Halo Infinite, as well as Call of Duty, is also reportedly working on a "Monster Hunter inspired" game.
Ultimately, this certainly sounds like the Halo battle royale dream many have been on the lookout for could be a possibility.