I just finished reading the latest issue of "The Brave and The Bold," written by Mark Waid. This is wonderful stuff! Waid has done a much better job in twelve issues than was covered in decades of the old Batman-centric B&B series.
Having this story arc center on the Challenges of the Unknown was a brilliant touch. What's more, the final scenes were absolutely touching. Waid has this uncanny ability to ask logical questions, such as "How does June Robbins fit into the Challengers, as the only member who has not miraculously cheated death?" The characterization that he provides is absolutely spot on, and the way he resolves this storyline is positively poetic.
As a testimony to Waid's genius, I never realized that the artifacts which Megistus had been creating all had transformative properties (well, except for the power battery, but that was clearly necessary for other reasons). I also loved how he worked in the likes of Firestorm and Metamorpho, both of whom were transmuters. If he could only have included Element Lad somehow...
Mark Waid, you're amazing.