I'm actually beginning to plan my own fanfic (unrelated to a mega crossover series I have going on, or stuff I have on fanon wikis). Here's a teaser trailer for it, the first chapter will be written as soon as possible. Until then, feel free to leave a review of the trailer, and what you'd like to see of the fanfic.

Teaser Trailer

For eons, the organic races have theorized the existence of alternative parallel universes: universes where events have not gone as they had here, or have even not caught up with the others yet. Long have these seemed to be the unintelligent assumptions of the organic races.

However…these assumptions have been proven correct…

16 individuals, specifically Teams RWBY and JNPR, with 2 other teams of 4 individuals: Team REPR (pronounced as "Reaper"), consisting of an Awakened Collector Adept (self-assigned designation "Retribution", nicknamed by allies "Retty"), a Geth Infiltrator (assigned designation "Enigma"), an N7 Paladin Sentinel (named Pierson Chancellor), and a Krogan Battlemaster Vanguard (named Wraksan Rukar); and Team CTDL (pronounced as "Citadel"), consisting of a Geth Juggernaut Solder (assigned designation "Centurion"), an N7 Demolisher Engineer (named Tiara Roger) , a Batarian Slasher Adept (named Drosk Dosnahal) , and a Quarian Infiltrator (named Lunn'Faanar vas Vera).

Now, in this new world, the organic hordes have bunkered down, and, with the organics of this world, they try to stall our might.

Both teams look out in the clearing in Emerald Forest, and see a large army of Husks, Marauders, and other Reaper Creatures, including what appear to be Reaper-ized Grimm.

They should know that resistance to our advance is futile.

Ruby lunges onto a Brute, hooking Crescent Rose to its neck, and before the Reaper Soldier has time to react, Ruby beheads it, leaping backwards, as Yang fights a Cannibal, blast it in the face with her gauntlets. Weiss challenges a Marauder, and Blake takes on a trio of Husks. Nora and Len take on a Ravager, while Jaune and Pyrrha try to engage a Banshee. The Banshee knocks down Jaune, but the creature is attacked by Rukar, before it could kill Jaune. Joined by Centurion, Rukar fights the Banshee, while Enigma and Lunn engage a group of Husks charging the 4 teams' high ground.

The inhabitants in this world, except for the ones identified as "Grimm", are immune to indoctrination, but their bodies, when killed, still make excellent soldiers. And these Grimm…

Ruby and Retribution are fighting a squad of Cannibals, but are forced to duck to avoid a Reaper-ized Nevermore that tried to grab them. The Reaper-ized Grimm perches above the fight, ready to attack at a moment's notice. Ruby and Retribution are joined by Pierson and Tiara, and they move to hold off a squad of Collector Troopers that arrive.

This world will fall to the Reapers, all resistance crushed. They will succumb…

The group manages to take out the first wave of the Reaper Forces, but more Reaper Creatures and Collectors appear from the tree-line, and, in the distance, a massive, metallic squid-like form lands, facing the group.

…Or they will be eradicated…

RWBY: The Reapers