So is EE not going to reveal the identities of the other figures? I'm not purchasing something that I have no clue to what it's going to contain.
We/Hasbro will reveal all 14 at Comic-Con 2007. The set is currently up for pre-order, and you can cancel at any time-- that way if for some reason it gets close to selling out and you think you might be interested, at least you're in line for it. But hey, July's just a few weeks away, and at least one more figure will probably be revealed before the show. I think people will be very happy with these.
I have a feeling that the Mandalorian that we've seen is the only new tool in the set.
Thankfully you would be wrong there.

Llats Ward is a partially new tool, but there is new tooling involved. There will also be at least one (maybe more, I ain't gonna say) completely new tool in the set. I'm very happy to say that this set is
not a big box of repaints with just one new figure.
I'm not too worried about holding off on pre-ordering these. EE never sells out right away (knock on wood.)
The first two shipments (or the first one and like 95% of #2 if memory serves) of our Clone Trooper packs did pre-sell out in 2005, they weren't "in stock" for quite some time. Kids love the Clones.