So it's come to my attention that many folks haven't ever heard of Freight Train who is acting as the muscle for the current Outsiders team bringing in some new blood to the team.
He debuted in issue 30 of the series but his origin story wasn't explained until issue 35 where we discovered how he received his powers.
When he first showed up he was explicitly stated as working for Simon Stagg. Simon Stagg is the father of Sapphire Stagg, Rex Mason/Metamorpho's ex-wife. Java, one of Simon Stagg's workers was also in love with Sapphire and hated Rex for taking "his" girl from him. Sapphire of course loved Rex and so on and since then Sapphire has somehow died very recently. (If anybody knows how that'd be nice to know)
Some issues ago Java even tried killing Metamorpho knocking him out while holding the Orb of Ra (the orb that gave Rex his powers but also hurts Rex if he's near it) and dumping him into Chemo.
Now in the present Metamorpho's been saved by his team mates Owlman and Freight Train and the three go to find Simon Stagg (or Java technically since he's always with Simon) but Freight Train apparently betrays them and lets Simon Stagg and group capture the two.
(Whoo boy, hope that made sense to you folks)
The big plan Simon has is to use Black Lightning as a power source and with research he based off of the Black Rings from Blackest Night to resurrect Sapphire.
( Freight Train revealed! )