User blog comment:Psypher/Young Justice: Legacy is complete. Less than a month until release./@comment-24179619-20131117135915/@comment-5188108-20131117194959

Interestingly, a review I read (google translated from Spanish, so grain of salt there) said you had to include Artemis in the first mission. We also know that you unlock some characters as you play through (the same review said you start with the "main six"). And if you look at the cinematic snippets in the trailers, there are often groups of three (the most obvious example is Nightwing, Batgirl and Robin in Gotham).

So I wonder if there will be obvious canon squads, but we'll have the option of not using at least some of them when we play. A bit like in the original Diablo, where there were three classes but the ending cinematic (and Diablo 2 plot) made it clear a Warrior killed Diablo.