A month or so back I wrote a theory as to who was in the grave. This was before we knew it wasn't Felicity, and in that theory I wrote:
"I got thinking about who got killed in Arrow. Now I don't think its felicity, nor do I want it to be. Out of the theories I have read it is always one of the main characters, felicity, Diggle, Thea, laurel, captain lance. My personal theory, is that it is Oliver's son. The one that he just found out about. Hear me out now, if you look at this photo of Oliver at the grave, it looks like the grave is too small to be an adults."
Then I showed these two photos:
Then I wrote:
"But if you quickly throw it onto photoshop and do a poor job of it you will see that the grave is about half of Oliver's size(6 foot 1). Say, the size of a kid? I know this isn't much to go on, but I really think that the CW wouldn't kill Felicity like that. She is to deep into this. I wouldn't be surprised if they brought the kid in to show the softer side of Oliver, and to bring tension in the relationship of him and Felicity, to raise the ratings for the mid season final, so that they would have more to work with when they go for a 5th season."
At that point in time, there wasn't much to go on besides what had already been said, but with the newest episode, the theory is getting stronger.
Before I continue spoiler warning for the newest episode (and episodes to come) of Arrow. Don't Read if you aren't up to date!
This is your last warning!
Great, so everyone who doesn't mind spoilers, here we go. At the end of the newest episode, Malcolm Merlin met with Damian Darhk. Malcolm said to Darhk:
"I know who Oliver cares about the most, and it's not Felicity Smoak. It's his son."
But that's not all, I predicted not one, but TWO things that is going to happen!
At the end of episode 10, when we find out Felicity is alive, we have a flash forward to the grave scene. We see Oliver get back in the car, with Felicity waiting. She isn't wearing her ring and she looks PISSED! This was predicted when I wrote by saying:
"I wouldn't be surprised if they brought the kid in to show the softer side of Oliver, and to bring tension in the relationship of him and Felicity, to raise the ratings..."
It makes sense! Darhk gets the kid, Felicity find out about him, gets pissed at Oliver for keeping the secret, she breaks the engagement, Darhk kills the kid, Oliver just lost the two people he loved the most! It's perfect! Of course though, that's just a theory.
To see my other post about this, click here.