I kind of have to agree with Yahtzee. I really would like a smaller more focused game, perhaps one focused on the power vaccum the collapse of the Covenant would've caused, but no, games always have to follow up threats with bigger threats because there's always another galaxy threatening super monster/weapon buried on the next planet over. Not only does it feel unreal because when they introduce another even more ridiculous threat that it turns out was there all along you wonder what the fuck is coming next and not in a good way, it belittles the threats of the previous games because past threats rarely get any respect, and when they do it's just them doing the same thing they always did. There's no freaking growth, it's just constantly trying to raise the stakes because that's what needs to be done.
Why can't we have smaller stories in Halo, why does it always have to be galactic threat # are we even counting anymore? Here's a thought. The SPARTANs were originally created to combat the Insurrectionists, people who want to declare their colonies independent from the UNSC and commonly resorted to terrorist actions to do so. They kind of went quiet during the Human-Covenant war, but now that that's over you'd think the Insurrectionists would crop back up because they thought the UNSC was being fascist and 30 year long wars aren't exactly well known for improving the quality of life in a nation. It'd be interesting to see Chief be forced out of the guilt free actions of fighting aliens who want to kill all humans and be forced to fight insurgents who want independence, because that's not as morally clean.
But no, more Forerunner doomsday weapons, HOW DID THESE GUYS LOSE TO THE FLOOD AGAIN WHEN THEY'VE GOT GIANT FUCKING ROBOTS BURIED ALL OVER THE PLACE!?