Originally Posted by
Lee
When Wally became The Flash, it really was a new idea. But it was a bumpy road at first - for a couple of years he only appeared in Titans, and it took a year or two for his solo series to really click into place. It could only really happen in the first place because they killed off Barry Allen and wrote Jay Garrick out of the series. (I think people forget that Jay was gone for 6 years. That's 1 year longer than Wally was gone from New 52 to Rebirth.)
With today's smaller audience, it would be more of a risk, and the idea wouldn't be as fresh. Today's comic audience has seen the replacement hero idea play out numerous times, and they know that 95% of the time it doesn't stick.
In the end, the predecessors almost always get brought back. Now we have 2 Blue Beetles existing at the same time, 7 human Green Lanterns, 4 characters called The Flash. It becomes unwieldy, because there's simply not enough space to give them all their time to shine on a monthly basis.
I disagree. Characters can grow without aging. I just watched a film set over the course of 3 days, and all the lead characters were in different places at the end of the film than they were at the beginning. And I don't think character growth, as you're describing it, is even necessary for a character to have depth or complexity. The entire cast of Charles Schulz's Peanuts is more complex than most DC characters, and none of them overcame their foibles.
A character like Impulse is compelling as is. Would turning him into an adult make Impulse more interesting? Does a character with a short attention span and low impulse control make more sense as a teenager or an adult? Would he even still be the same character if he overcame those foibles? What would be left?
I don't think ambitious or risky writing requires turning a kid character into an adult character, an adult character into an an elderly character, or for a young character to start wearing an older character's clothes.
I don't think "10 years from now, Robin will be 1 year older" is a strong enough selling point for a line of comics. If DC were going to do this, then the separate line going by in real-time would be a better selling point. But the approach to writing would have to change, there could no longer be 6 issue arcs that take place over a single week. But what would the starting point be? Superman's first day? The formation of the Justice League? Where we are now, with Damian Wayne as Robin?