User blog comment:Thailog/Ep. 201 "Happy New Year!" discussion/@comment-3118271-20120504204248

wait a second  it was never said when they(new members) joined the team. And Beast Boy is on the team

so maybe a jump back occurs during episode 11. and that  the first part is an alternate timeline. I could see the first 10 episodes lead up to the world of 2016 exploding  but Nightwing and Zatanna ( Nightanna )   travel  back  and warn  the team. As the original 8 were seen together in a scene in a promo and Batman stated   I fear your  team is our only hope or something.,   Nightwing and Zatanna or someone  would tell them of Rann and everything (what they did wrong)   so they will be prepared. Young Zatanna will ask about her future like if she ever saves her dad. 19 year old Zatanna informs her sadly that it is in a work in progress. Tempest, Beast Boy and many others still join the team. Cause let's be honest with a 53, two 18 year olds , two people around 20. It's not really young justice