Well, unfortunately, I will be getting this too. I passed on the Bounty Hunter 4 pack because all it had new was the EU swoop. But with the containment unit, I must have this set.
I just started head swaps when I participated in the artoosnews.com SH4. BTW, I could never force the new head back on. I ended up shaving the nob off bit by bit with finger nail clippers until it was small enough to fit back into the head hole. Luckly, it was still large enough that the head wasn't loose.
Anyway, I will either customize or give the 4 figures to my son or something. I would have much preferred them doing a little extra like they did in the previous 4-packs and either give different heads with the jedi or given us the 3 previously release jedi padawans with 3 new heads... something different.