User blog comment:Rassilon of Old/Young Justice spoilers at Comic-Con 2012/@comment-5185866-20120716122048/@comment-5188724-20120716212731

<3 Means love so "<3 her to pieces" means "love her to pieces" I.E. loves her a lot.

I really don't think that M'gann is posing as Tula in that clip. Pretty sure M'gann can't do that fiery water move. My guess would be that Aqualad and Artemis are talking about their mission and then remember Tula's final days through a flashback. That or Tempest comes out from under the rock hes been hiding under and discusses her death with the Team.