(Note: I didn't finish the game yet, just passed Rambi Rumble, I could be very wrong.)

Something that slowly dawned on me is that everyone in this game refers to Donkey Kong as DK. I thought it was just a cute thing Pauline had reading the initials on his tie, but VoidCo, most friendlies, and even Diddy & Dixie just call him DK. And Donkey Kong Island is now "DK Island". My initial thought is, "okay, DK os just short for Donkey Kong" -- but why are all the Kongs calling him that, too, but they all refer to each other with first names? Outside of the title screen and DK Rap (a legacy theme), nothing as far as I can tell directly names the title character Donkey Kong so far.
So my next thought is: is this a subtle way of telling us that this Kong isn't the same Donkey? Think about it. I know things are crazy enough with the Pauline theories, but this can be another, overlooked clue on what's really going on.