Obviously the Ulteman didn\'t last long in the fight for two reasons
1) The JLU new that they were a Cadmus project and they pretty much were keeping Tabbs on everything Cadmus was doing just like Cadmus was keeping tabs on them. Batman even said this. So obviously the league knew thier studied thier weaknesses anticipating that they would eventually have to fight them. They Probably expected multiples of them. Batman expects the unexpected he would of made that the JL would to.
2) Gala only had one goal in mind, killing Supergirl.
She was too focused on that so she didnt bother to bother with the Ultaman. Who even though they most likely were more powerful then before, they were mindless, there for couldn\'t think for them selfs