A joint Klingon-Federation mission?

[UssGlenn]

The only thing we know from TNG is that Worf was the only Klingon serving on a "Human Starfleet vessel" at the time of the first TNG season.

That leaves a lot of room for Worf not to be the first.

"The Sword of Kahless" establishes that Worf joining Starfleet was "Something no Klingon had ever done"

 

[Laura Cynthia Chambers]

So maybe like Kira hadn't joined Starfleet but was Bajoran Militia, a Klingon could work with them without officially joining them...

 

[F. King Daniel]

"Balance of Terror" established cloaking devices were a theoretical technology until 2266, but Enterprise ignored it. Discovery may take a similar loose approach to continuity.

 

[SiddFinch1]

I agree with guess it is the Vulcanian Expedition. Could be some type of contest between feds and klingons..

 

[Shawnster]

Why does a recurring Klingon captain mean working with the Federation? Can't the antagonist be a recurring Klingon captain?

 

[Kor]

This Klingon will be the Ilya Kuryakin of Trek.

Kor

 

[Blackbird2009]

I have a theory about Discovery. That a crew from the future will some how go back in time to 10 years before TOS. Either they are lost in time or have a mission. This way the Klingons and Human will work together.