Here's my swing at this.
Viewers know the whole tombstone ordeal right? How those 27(?) vampires were stuck in that tomb for over centuries until Bonnie and Grams opened it and they were free. We'll think about this, we're kind of in a similiar situation. Season one has ended and we're waiting to be 'free' in season two. So let's do what they 'did' back during the waiting period. This 'activities' can be spread weekly, biweekly, montly, however during this hiatus, as long we have something to do during this long period of wait.
1. Remember our favorite memories from the show before being in this tomb (before haitus)
We can show them VMs, siggies, stories, etc.
2. Predictions of life out of tomb (season 2) again can be done by VMs, siggies, stories.
3. Being Katherine. Okay so this one isn't really about being Katherine, I put her name her because everyone in the tomb knew Katherine same for people out of the tomb. This activity is where we vote which member is like what character in the show. The member chosen will make something (VM, story, siggy, something) to say what are good and bad things about them, why they think they got choosen for this, most memorable thing about them in season one and prediction on season two. You can also include a ship if you ship them with someone and why.
4. It's supernatural. This one is very diff from all of the above. We know in the show wh ois human, who is a vampire, who is a werewolf, who is witch. But now we are a certain character, and as the person we get to chose if we want to be supernatural or not, if supernatural, what exactly? In some manner show how you reprent that supernatural area (suck blood, make spells, transform you self into a wolf) it can be done mostly in a siggy or a picture representing that.
5. Finally, the loyal ones. As the last activities the whole tomb will vote thier king and queen, who will say a few things to lead us out of the tomb (onto Season 2) sort of a pep-talk.
I know it's a bit weirdly planned and bit sloppy, but if chosen, I promise to make it sound much better and cooler than it is at the moment.