Via Polygon and CharlieIntel:

https://www.polygon.com/2018/4/17/17248230/call-of-duty-black-ops-4-single-player-cod-blops
https://charlieintel.com/2018/04/17/rumor-raven-software-possibly-working-on-battle-royale-mode-for-black-ops-4/

Polygon:

Call of Duty: Black Ops 4 won’t include a traditional single-player story mode, according to sources with knowledge of the project’s status. The shift in creative direction will make Black Ops 4 the first mainline Call of Duty to ship without a standard campaign.

When reached for comment, an Activision spokesperson said, “We don’t comment on rumor and speculation. We look forward to revealing Black Ops 4 on May 17th.”

The sources, who asked for anonymity, said that as Black Ops 4’s release date approached, it became evident that development on the single-player campaign wouldn’t be completed. One source said Treyarch has since focused Black Ops 4’s development on expanding multiplayer and the series’ popular Zombies mode. The source described an emphasis on cooperative modes as a potential stand-in for the typical single-player campaign experience.

CharlieIntel:

Earlier today, Polygon reported that Treyarch has decided to scrap the campaign mode in Call of Duty: Black Ops 4 once it became clear that they would not be able to have the campaign ready in time for the game’s launch in October.

charlieINTEL heard similar rumors last month from a tipster, and that same tipster also informed CI that Raven Software has reportedly been tasked with adding a Battle Royale mode to Call of Duty: Black Ops 4 to fill the content gap of no campaign.

But i only buy them for the campaign, have yet to even touch any COD multiplayer

It will have a campaign. But the other part of the rumor is probably true.

That would be a piss poor decision by Treyarch but they have already failed giving us a decent campaign twice in a row, so I had no faith in Black Ops 4 from the start.

well if no campaign, I can not think of spending more than $20-$30 for it, which this might be the first cod i have skipped all together. alot of other things out there that can take its place this year.

Edit: if i remember correctly with cod 3, unless you had the season pass you couldn't even get to zombies, and now its another separate purchase for cod 3. Which i guess if you want just that, it works for you but its like 3 parts to 1 game to play its like steroid DLC.

Dark Souls battle royale when?

So if true, i wonder if it is because Treyarch expected to release in November as usual, but then Activision made the decision to launch it a month early to get infront of RDR2

I'll buy it anyway but its a big mistake to not include a campaign.

If that were true, I don't see why they'd even call it Black Ops 4. I know I won't be buying it if there's no campaign

Thank God for Nintendo and Sony.