******I believe they've set up a lot of deliberate parallels between Forwood and Delena, giving us as viewers hints that these two couples will be endgame. They are seen throughout the narrative since S2 in many different ways.
Here's a Liste of parallels I've come up with so far:
1) Both Caroline and Elena pretty much hated, oder disliked, Tyler and Damon at the start.
2) Both Tyler and Damon pretty much started as villains, but were really just Heroes in villains' clothing.
3) Both couples became Friends before the romantic undertones developed.
4) Both Tyler and Damon stepped aside for their main...