Half of the group targeted Kara while the others glided through the air to intercept Clark from aiding his cousin, three launching themselves with blades pointed at the Man of Steels chest while two threw star like projectiles that were aimed at his neck. He ducked underneath the stars and thrust his arm upwards, connecting with the gut of one of the attackers, forcing the now limp body into the air. Speeding up and grabbing the body mid flight, he threw the unconscious attacker at his squad mates, nailing another with the surprise projectile while the others dodged and regrouped as Clarks feet connected with the ground.
"There's no way I can talk you out of trying to keep this battle going, huh?" The Shadows heads snapped to Karas situation in unison before hastily grabbing smokebombs situated on their hips and throwing them to the ground a millisecond too soon for Clark to react. Cursing vehemently, Superman charged into the smoke and grabbed at nothing but vapor, gliding out of the fog and noting that the Shadows had pulled the same party trick with his cousin.
"You alright?" He noted the cuts on her suit and wanted to ask how she felt, but knew that she would brush off the question, so instead he pointed at the crate the Shadows were so intent on guarding.
"Why don't we see what the League was trying to get into Metropolis?" Moving to the crate, he attempted to see inside only to shake his head.
"Lead lined. Shocker." Instinctively he thrust his arm in front of Kara, looking down with a chuckle.
"Can you blame me for being protective?" Dropping the arm, he refocused its effort to ripping off one side of the crate, aluminum canisters tumbling out, all of which had no markings. Peering inside the can with gifted eyes, he frowned.
"Nothing. At all." He levitated a few inches above the ground before circling the container, frown growing even more.
"Not even a clue as to where it was headed." Sighing, he glanced at Kara with grim certainty.
"Bruce could probably figure out why Shadows would be guarding something as seemingly innocent as this. We're headed to the cave." Clark grabbed the side of the crate he tore off and sealed it back with a few concentrated blasts of heat vision.
"You've never been to the cave, have you? Just...don't touch anything. Hopefully he won't be too grouchy that I brought you along without his authorization." Before Kara could comment, he quickly added:
"Yes, he IS that paranoid. One of the many reasons we love him."

-------

"Bruce, where's the footage? It's-" The computer chimed that it was ready to go and was primed to playback on Bruce's say so. 
"Never mind. It's here, does that mean I can go now?" A sudden gust of wind blew through the cave, nearly bowling Dick over.
"That's one way to enter. Didn't even hear the car." He turned to find a shipping container sitting in the middle of the cave flanked by Superman and a very, very attractive young woman in an outfit that was...flattering. 
"Didn't think you hung out here anymore."
"I don't, but when the Man calls, it's hard to turn down. Kinda feel indebted to him for, you know, raising me." He walked to the young woman, extending a hand.
"You must be the Supergirl I've heard about. Dick Grayson or, if you're feeling formal, Nightwing." He offered his best smile, chest puffing out just enough for her to maybe see certain details about his physique.
"Dick..." Clarks tone was admonishing, which made the Grayson boy want to pursue the assumed Kryptonian even more.
"We need his help, maybe yours too."
"Right. Tell me what you've got."