The devs hit up a game conference in South Korea and shared a few tidbits, saying that vehicles are coming soon(tm) and they mentioned being interested in doing crossover events with IPs like 40k and Starship Troopers. They're aware of the Chaos divers and seem to be interested in incorporating them into the game.
I hope they do an invasion mechanic, they could add an additional mission variant with double sample payouts, but at the risk of being invaded by chaos divers, hell, add another faction that is reskinned super earth, but they only have limited stratagems, reset progression system to keep it balanced. In-mission goal is to stop the helldivers from completing their mission and deplete their spawns, you get half of the spawns, can't see where members of the other faction are on the map except for like, a large region of the map they are in, or maybe as an area of effect thing like the jammers. Make the mode 1 invader for every 2 helldivers, bam, a pvp option that the crybabies can completely avoid, and when they don't avoid it they are still at an advantage for whatever lore reason used to justify the invaders being underpowered.
Or if they wanted to stick closer to the heckin neutral anti super earth gayos diver faction, they could just make it an underpowered faction for try-hards like myself, have the opt-in missions that allow helldivers and gayos divers to invade each other mutually.
I don't have high hopes for anything like this, but if they pulled it off I could see it being a huge hit (and replacing my elden ring invasion addiction). It's such a fun feature and more games should have it. Sniper and watch dogs did it well but those games had limited longevity, helldivers could get a few years out of it at least.