Two Hungry Dino-Mites with Bubble Fightin Fun Down Tight Vs. TEAM

 Two Hungry Dino-Mites with Bubble Fightin Fun Down Tight are Nightwing (w/ a green lightsaber & green lantern ring), Red Robin (w/ double-bladed orange lightsaber), and Bene Gesserit Sisters #1-6.

TEAM is Black Lantern Yoda.

Nightwing and Red Robin have returned to a place where they both spent much of their youth for some necessary training exercises.  Batman and Alfred are not there; but they know their mentor will have lessons on file that can help them in properly wielding not only their new lightsabers, but also the green lantern ring that has been gifted to Nightwing.  Dick Grayson remembers well that Batman too briefly was empowered by one of these rings back when he was the original Robin.  The six Bene Gesserit Sisters were blindfolded when entering the Bat Cave; but are very much looking forward to enhancing their own hand to hand combat skills by utilizing Batman's many training facilities.  It is unfortunate, that before they can begin, alarms start going off and the Bat Cave begins to go into an automatic shutdown mode as a counter-measure to some sort of existential threat.  

"Were we followed Dick"??  Tim Drake asks of his friend.

"Can't be.  We covered our tracks perfectly.  This is something very different, with amazing skills that has sought out this location".  Grayson answers.

The eight Dino-Mites rush over to the computer to see the threat assessment appear on the screen.

Threat height:  Very small.

Threat weight:  Very small.

Threat size:  Immense.

DANGER.

DANGER.

DANGER.

Full lockdown and counter-measures suggested.

Full doomsday protocol highly recommended.

Nightwing orders Red Robin to take five of the Bene Gesserits and begin the defensive posture that he has been trained to do in these situations, and assures him that he will join them shortly.  But before he can, Dick Grayson takes Bene Gesserit Sister #4 with him and leads her to the Bat Cave's secret elevator which leads directly back up to Wayne Manor.   He hands her a piece of paper instructing her to read it carefully and do exactly as it instructs, before he pushes her into the elevator and sends her up to The Wayne Family Library.  

The Bene Gesserit reaches the library and opens up a desk drawer that becomes a screen, giving a full view of the cave and the fight that is beginning to take place in it.  She cringes as a tiny dark figure with a sword similar to that which Dick and Tim were training with mows through her five sisters with relative ease.  Not even using his sword on them, he blasts them with what seems to be a wall of black-colored energy before engaging the two Batman-trainees in a melee energy-saber battle.  The young initiate of the sisterhood then watches as the diminuitive figure moves with amazing speed and athleticism bouncing around Red Robin, working his way behind the accomplished fighter and acrobat and removing the young Tim Drake of his head.

"NOOOOOOOOOOO" Nightwing screams, as he flips into the air himself, lands in position picks up Tim's double orange saber and rushes at BL Yoda with both the sabers and a thick green-energy aura around him as his only remaining allies.  Nightwing attacks with perfect form, not allowing the death of his dear friend to cloud his judgement, his choices, or his fighting prowess.  After a seemingly pitched battle continues for a few moments, Grayson lunges with what he feels is a perfect finishing manuever; but before said move is delivered, he sees the creature move with amazing speed to get underneath him and then feels the intense heat of a black-energy laced lightsaber enter beneath his chin and up into his brain.  

Bene Gesserit #4, safely in the above library gasps as she sees her final teammate die and then quickly rereads the last sentence on the sheet of paper Nightwing handed to her:

"Should every member of our last line of defense fall, head swiftly to the book shelf and pull out the top shelf copy of "A Tale of Two Cities"".  As it said it would, the book had a small touchscreen on the back with only two button options:  

1.  The Best of Times.

2.  The Worst of Times.  

She follows the orders exactly as instructed, presses option number 2, and then watches on the monitor as The Bat Cave uses its advanced computers to fully analyze the threat and go into full Self-Destruct Mode.