I'm not knocking Delena and the chemistry between them, because it's undeniable that they are insanely hot together, but realisitcally Stelena will be end game. Big differences between Stefan's love for Elena and Damon's love is that Stefan respects Elena's choices and gives her free will, as opposed to Damon who loves her to the point where he will do anything even if Elena disapproves to keep her safe. Both are lovely, and appeal to Elena, but I think putting Elena's personality and her desires while human into account, she will choose Stefan once she get full control of humanity back. The humanity side of Elena will win out in the end, we all know that and the human side of Elena wants to be respected and allowed to have free will to make her own choice and live her life the way she chooses. Stefan allows her to do that. Damon on the other hand acts without consideration of Elena's wants.
Sorry, but be realistic here people. Stelena is the most likely and should be end game. If Delena is end game I will be gobsmacked on how they can make it 110% justified and tie all the loose ends up between Elena and Stefan. But yes, Stelena is end game.