Teen Titans Academy ends with a tribute to George Pérez and questions about the Titans' future

gamesradar.com:

On May 24, DC released Teen Titans Academy #15 (opens in new tab), the final issue of the innovative series in which the original members of the Teen Titans open a school for the next generation of heroes. And though the final chapters have brought closure to a lot of the arcs begun in issue #1, the future of the Titans and their young recruits is still very much an open question. 

Of course, that's true for the entire DCU, since the Justice League is, at least for now, dead and gone. 

We at Newsarama have postulated that, if anyone is going to take over for the JL, it should be the team of 'next generation heroes.'  Dark Crisis writer Joshua Williamson seemed to say the same when he told the Beat (opens in new tab) that Dark Crisis is "a story about the sidekicks, like the new generation [...] the Tim Drakes, the Kyle Rayners, and then again, going back to Nightwing and the Titans." But does that mean that the Titans will replace the Justice League? 

The answer that Teen Titans Academy gives is not a simple one. 

Teen Titans Academy #15 is drawn by Tom Derenik, written by Tim Sheridan, colored by Peter Pantazis and Matt Herms, and lettered by Rob Leigh. Part of the plot revolves around Titans Academy students traveling to Apokolips to free Shazam from the forces of Darkseid. Some of those students are Megabat and Bratgirl, Gotham City orphans that make up two-thirds of TTA's "Bat Pack," who were brought to the school by Nightwing. The Bat Pack yearn to be just like Batman himself and, while on Apokolips, prove that they someday might be.

As other students Stitch, Matt Price, and Nevermore work to free Shazam from his chains, Megabat and Bratgirl respectively brawl with Parademons and hack Apokoliptian technology. This