That brute from the Halo TV series might be Halo Infinite's Atriox

gamesradar.com:

The latest episode in the Halo TV series might have introduced an iconic villain from the games. 

In the final moments of Halo episode 5, after the Covenant appear and attack Master Chief and the UNSC, a Brute drops down to the planet. It's the first one we've seen in the series, and we only catch a brief glimpse of him before he's beamed up to the Covenant ship, with the artifact Master Chief was supposed to be protecting in hand.

It looks like that Brute may very well be Atriox, the villain from Halo Wars 2 and Halo Infinite. David J. Peterson, the conlanger (or language creator) for the Halo TV series shared a script of the Sangheli dialogue he wrote for Halo episode 5. While much of the Sangheli is subtitled in English so we can understand what the Covenant are saying to Makee, a human who the Covenant considers their "Blessed One", much of the dialogue in the fight scene isn't given on-screen translations. Peterson provides this however, and towards the end of the script he refers to the Brute as Atriox.

So, according to this link, the Brute we saw at the end of episode 5 is indeed Atriox! It’s not official yet, but I KNEW it had to be him given how similar his face is. Before complaining guys, remember: new timeline, new rules. https://t.co/UE4mYc07Yr pic.twitter.com/fEmlAlND77April 22, 2022

Naturally, fans began comparing the Brute's design to Atriox as he appears in both Halo Wars 2 and Halo Infinite. This version of Atriox would naturally be younger, as the events of Halo: Combat Evolved haven't taken place yet, so the shorter, darker beard on this Brute would make sense. His Gravity Hammer also bears a resemblance to the one Atriox wields - it even has a curved handle like his, which is a detail that seems