Unfortunately, Nina’s guest starring role as Katherine Pierce in Season 4: Episode 13 of The Originals has been removed from Nina’s IMDB profile. Upon first glance; this may mean it was just a wild rumour and will not be happening. However, on second glance we have technically all been here before regarding Nina’s appearance in The Vampire Diaries finale. If you recall, IMDB actually listed Nina’s appearance in the final-ever episode of The Vampire Diaries while almost everyone elsewhere was reporting that Nina would not be returning in addition to the fact that the listing specifically referred to Season 8: Episode 16 before it had even become public knowledge that the final season would be 16 episodes.
There are reports that Season 4 could be the final season of The Originals due to its reduced length from 22 episodes to only 13 episodes. If Season 4 is to be the final season, then it would make sense to have Katherine Pierce or another doppelganger feature in some way to show how the Petrova bloodline would continue to evolve or for Katherine to finally get her revenge on Klaus. The involvement of a Petrova doppelganger could perhaps even lead to an important element of a spin-off series containing characters from The Vampire Diaries and The Originals.
If Nina is officially confirmed for a guest starring role as Katherine Pierce or even another doppelganger in The Originals: Season 4 – Episode 13, then we should expect to hear an official announcement within the next few weeks as The Originals: Season 4 began airing on The CW on March 17th 2017.

Nina Dobrev has just made a return to Funny or Die with Overheard LA which revolves around a man telling his friend what random comments he has just overheard in LA. Nina’s character sits at a table in a restaurant and proceeds to ask her friend in a serious tone, “Why would they schedule Easter during Coachella?” and other such pearls of wisdom including “Every new friend I make is just another person who might ask me to take them to the airport in the future and I do not need that. That’s why God invented Uber” which is so nasty yet quick witted that it actually sounds as though it originated from Katherine Pierce.
The video’s duration is a little under two minutes and can be found at http://www.funnyordie.com/videos/9bc05c796c/overheard-la-with-nina-dobrev
There is potential for Nina’s appearance in Overheard LA to be quite popular as Nina has previously starred in the Funny or Die original SPF music video that has achieved Hall of Fame certification as one of Funny or Die’s best exclusive videos having been viewed 2.1 million times since debuting on July 2nd 2012 and can be watched at http://www.funnyordie.com/videos/3d673108bf/spf-with-nina-dobrev