Atom displays his ability to float in his microscopic size. This is not something the show covered, but was seen in the mainstream comics.

We see the Phantom Zone projector, though of a different design from the episode ‘The Doomsday Sanction’.

We see Firestorm who is an active League member in the comics though never seen in the episodes.

We see the Royal Flush Gang from the episode “Wild Cards”

A Tour of the Watchtower-

The room similar to the original member’s private conference room (but is clearly not) is called the ‘meeting room’, we have also seen this in the first issue, and most of the comics wherein Carlos Barberi is the artist.

We see the science lab. Here is stored the Phantom Zone projector.

 A lesson in shrinkage-

1. Breathe out all the air while shrinking. This will cause your lungs to deflate and re-inflate properly.

2. Vertigo is common in the first few ‘trips’

3. One’s powers do not shrink relative to size. Therefore one’s energy level can seem like they have been magnified a million-fold.

This has got to be one of the most entertaining JLU comic adventures I’ve ever read. We finally get to see what it’s like to be the Atom. The experience of shrinking is described in great detail. It is also good to see Ice in full (and speaking) action. Her queasiness at being shrunk was one of the fun highlights of this book. Issue 3 is definitely the move of the comics onto better, smarter storylines that cater to the kid demographic but won’t dumb out adults in the process.

-    Ice’s full appearance.

-    Delving into Atom’s ‘world’.

-    Featuring 2 'Adventures in the DC Universe' stories.

    one with Mister Miracle, Big Barda, Oberon, and another

    with Power Girl

-  (in DC Kids) being the first issue to start disincluding

    the inlay cover for the second story  (Teen Titans Go) on the main cover.