Anyway, the sketch showed an edited clip of the film's villain Benedict Cumberbatch talking to his co-star Chris Pine who plays Captain James T. Kirk. Cumberbatch's character has often been referred to as John Harrison, however, the credits used for this sketch shows Cumberbatch playing a character with a different name and certainly one familiar to Trekkies.
So on Wednesday's edition of Conan it was noted that a genre news website has picked up on this sketch and reported on the spoilers. I can only see one potential spoiler, the true villain of STID. There had always been rumors of who the antagonist of the next Star Trek film would be and it could've been anyone from Khan (who appeared in the original series episode "Space Seed" & film The Wrath of Khan) or Gary Mitchell from the Star Trek pilot "Where No Man Has Gone Before".
As for the possibility that Conan has nothing but spoilers for the 13th installment of the Star Trek film franchise you can watch his answer to that right here. That's what we get for taking that above sketch very seriously. I suppose if nothing else we shall have to wait until the movie comes out to know for certain!
Another piece of big news the date for STID's release was already set as May 17th, but it has recently been pushed up a day to May 16th.