Bringing this idea over from OT1. I need it 343i. Please make this happen.
Glad to see its getting some good reception.
I think the biggest reason Warzone needs a PvE mode is that as it stands, who wants to use a badass legendary REQ card if they know they might just get capped in the face seconds out of their spawn?
People play with much more confidence against AI opponents since they are considered to be less dangerous than your average player, and as a result it's a much more relaxing and (for some people) rewarding experience.
This in turn would make people use their rare REQ cards more often, leading to the purchase of more REQ packs.
Also serves as a contender with Blops III zombies, and Destiny's strikes, which Halo 5 has no alternative in case people are looking for something similar.
But hey, if a random guy in a forum can think of this, I'm sure the idea has been floated around 343. Shame Frankie isn't around to give some feedback.
Edit: Oh, forgot one. Weapon sandbox. Sending a variety of enemies from different factions at the player encourages the players to pick up different weapons for the situation. This leads to more REQ's being used, and again that leads to more REQ's being bought.