I Have A Theory or Episode 2 of Lost's 4th Season

So, last week on Lost, we had a motley assortment of characters-sent there by Mr. Abbadon (whose name refers Hell, pretty much). I think they were sent there by Dharma and here's why:

1) We have a physicist-someone who could locate a magnetic anomaly-like the one that is on the island and protects it from being seen and which disappeared for a few minutes when that button wasn't pushed when the numbers wound down. A physicist who could explain a magnetic anomaly.

2) An archaeologist-who could not only find things that are buried (like Dharma observation points) but who really wanted to a a polar bear buried in the Tunisian desert-a bear that had a Dharma tag attached to it.

3) And last-we have someone who can talk to the dead. Who else could they use to find out the truth of what happened to the Dharma people?

And finally-if Ben killed all the Dharma people, they would really, really want to get him. If these people are they to find the truth, then they are also there to find him.

Okay, that's my theory-I like it but it could be totally wrong and I'm prepared for that. It is Lost, after all.