Board Thread:General Discussion/@comment-6033527-20130407101955/@comment-1038387-20130707155815

Byfield wrote:

The same is true of the Teen Titans. Editorial decided some characters don't exist (Wally, Garth, and Donna) and some appeared out of order (Vic as a JL founder and Bart) so it was easier to nix the original and "new" Teen Titans from continuity. This one may have a bit more blow back, but the current status quo is still ticking along.

And seriously, Wally, Garth and Donna were already out of the picture as Teen Titans for a decade or more (close to three in Wally's case), they weren't even current in Titans. The teams moved on.

And if your rebooting, you're rebooting with your aces, the most popular characters. Mixed with a shorter timeline, you have to axe some of the less relevant characters.