My brother and I both watched the stream. He is a big halo fan and keeps up with halo more than I . When it was over I got the Req pack and did not . He was on his on Xbox and both have our accounts on each other Xbox. I think this is a bug. Is there a way for my brother to get the Req pack ? His Username is Sonmair617. Could you send a code to him if possible ? It would mean a lot .
Hey OP, you can get the free REQ pack from the Xbox Store 
https://store.xbox.com/en-AU/Xbox-One/DLC/Halo-5-Guardians-Halo-World-Championship-REQ-Pack/70ef0815-4488-44de-beed-d2852df07399