Supernatural - spoilers up for episode 20

[agt_spooky]

We're gettin' down to the last few episodes here, people! Woot!

Only one page of sides was released, for a character called Carmen for the episode titled "What Is and What Should..." and since SpoilerFix did a great job of summing it up, here ya go:

Episode 2.20: What Is and What Should
Airdate: 5/3 (tentative)

From SpoilerFix:

Dean is attacked by a Djinn (http://en.wikipedia.org/wiki/Djinn), which warps his reality when it touches him. He wakes in a Lawrence, Kansas apartment next to a woman named Carmen. When he calls Sam to report, the exasperated little brother accuses Dean of drunk-dialing him (hearing 'gin' instead of 'djinn') and tells him to sleep it off. After hanging up on him, Sam returns to his research books - which include a law school textbook.

~~~~~

Ok, so is this the beginning of the "Dean arc" that Kripke was talking about?  And I'm also nervous that perhaps THIS is the episode that John will be in and not the season finale, like I was hoping.  We know Eric said no flashbacks, but since this is warped reality, it stands to reason that John would still be alive in this universe.  Please, please, Eric! I want Sam and Dean to march into Hell to save John instead!

What do you guys think of this summary?  I think it sounds interesting and I'm glad it's a creature that we haven't yet seen on SPN. And man, if John is in this episode, can you imagine the Dean angst when he sees his father again??