will katharine be released from the tomb any time soon??
i think she mite b/c there has to be an ending to the " originals' " hunt for her and im pretty sure elenas not going to be the one to be sacrificed...that idea is just wack! so my theory is that katharine will be released but not stay alive for long, but during the time of her release there will be some drama, shes probably been plotting her revenge against the salvatores for putting her in the tomb, but she has a sensitive part of her for the safety of elena, remember her final words b4 her entrappment in the tomb..."elenas in danger, shes the doppleganger she must be protected" by her saying that she knew rose and trevor were coming after her but she knew that now that shes in the tomb they would know shes there and get elena instead, and they knew it was elena cuz when elena explained who she was cuz she thought they thought she was katharine rose said she already knew who she was. so katharine would put her revenge on hold and focus on saving elena, but from new predators, since that dude elijah wasnt killed hes going after elena and the originals will show up for backup and they will find katharine instead of elena which is wat they came for, they will stake her and elena will be safe, and katharine would not have had a chance to go after the salvatores so all 3 of the main characters would be safe. i think my theory is pretty accurate dont u guys?? so in the end i think katharine will show that she has a little humanity left after like more than 145 years later, even though she wanted revenge over her past lovers but that will soon be ancient history!!!!!
I don't think she knew that Rose and Trevor where after Elena......I think that she knew that the origanals would find out that she didn't die in the tomb......and would come after her to get revenge, but they would find Elena and take her instead.
I like you're idea......but I'm not sure.....
I think that both Katherine and Elena are too important to die. Because Katherine is a Vampire, her sacrifice will not help the Originals in any way, and I think that Katherine could possibly sympathise with Elena, as she knows how Elena feels about being sacrficed. I think that Sefan will find out that Elena is in the tomb with Katherine, and he will rush into the tomb without thinking, trying to help Elena. I then think that Bonnie will get Lucy to help her open the tomb, to free Stefan, and Katherine also escapes. I think that Katherine will cause a lot of trouble but eventually aggree to help the Salvatores fight the Originals, because Katherine's safety is at risk too, and afterall Katherine is very selfish. I think that somehow the 4 will beat the Originals, and I think that Rose will help. I also think that perhaps in order to get to Stefan, Katherine might turn Elena into a Vampire, or hurt her.
It's just a guess, I have no evidence, I was just thinking maybe that might happen :)