The JSA did a control. He was actually Barry's son.
<<Ok>> Barry said:<<So tell us>>.
<<Ok>> Bart said:<<I come from 2036. I'm here because I want to help you to defeat Godspeed>>.
<<Just for that?>> Wally asked.
<<And I was interested to know my dad, to know better him>>.
<<Ok>>.
<<Listen>> Barry said:<<Ehm, Bart. Time travel can be really dangerous. I think you didn't thnk about everything bfore jumping here>>.
<<I wanted to... help you>>.
<<I don't think you should stay>>.
<<But...>>.
<<But I can't send you back so... you can stay>>.
<<YES!>>.
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DC ADVENTURE JSA AND BART ALLEN
Science FictionThe JLA is fighting against Godspeed and Flash's son comes back from the future.