Let's consider Captain Marvel in Thunderworld Adventures.
Thunderworld Adventures gives us the story of "Captain Marvel and the Day That Never Was." (Did you notice it is Captain Marvel and not Shazam?) It's a great story that starts with the unthinkable happening at the very beginning - the Rock of Eternity comes under attack by Sivana. This comic has a great story and beautiful artwork. It could be the type of comic I could picture C. C. Beck drawing for Captain Marvel Adventures or Whiz Comics.
But how well did Thunderworld do where it really counts for comic publishers - did it sell? Holy Moley - did it sell! Thunderworld ranked #41 out of 421 comics sold to North American comic shops as reported by Diamond Comic Distributors. Thunderworld sold 47,714 copies in December of 2014. Clearly fans new and old loved this Captain Marvel adventure.
Now let's consider the more recent Convergence Shazam.
Convergence Shazam had 2 issues with a fantastic story and art. Like Thunderworld, it featured Captain Marvel and the Marvel Family. It didn't quite have the whimsical nature of Cap in Whiz Comics, but it wasn't a dark and gritty story like many of today's comics.
Did Convergence Shazam sell? Yes, yes it did! Convergence Shazam #1 sold 39,587 copies. It came in as #61 of 479 comics sold in April of 2015. Convergence Shazam #2 sold 32,984 copies, ranking it as #60 of 396 comics sold in May 2015. (Note: I stayed with the same source for sales for each issue so as not to skew the numbers by quoting from multiple sources.)
The combined sales of Thunderworld and Convergence Shazam is a phenomenal 120,285 copies! Each edition sold well and ranked high in the sales chart thus indicating a true desire from comics readers to see more issues of Captain Marvel in action.
In my opinion, Thunderworld and Convergence Shazam offer Captain Marvel fans what they want. These titles bridge the gap for both old and new fans. They refresh the Captain Marvel character without damaging his origin or disenfranchising loyal fans of the Captain Marvel of the '40s and '50s (of whom I am one!)! It is my sincere hope that DC comics takes note of this and gives us more like it.