This mod was put together a while back.  I thought I'd share it here on PWM.  :)

Here is the OG description:
This mod includes a complete overhaul of all the characters, removing all the fictional characters in the game and replacing them with real world characters.  All characters have been set to their "prime" age and stats.  There are over 250 extra themes includes as well (every wrestler will have their unique theme).  

300+ CHARACTERS - 100 CHARACTERS MAX PER MATCH - 100 WEAPONS!!!
The game is used best with the following base as promotions:
Fed Online : ECW
AAW : WWE
UKW : TNA
Japan : NJPW
MLW : NWA/Old School
Lucha : AAA
EWS : Indys
Hollywood : Movies
SSW : UFC/Bel

*Installation*
- Be sure you have the Steam version of WR3D installed first
- Install the WRHD patch before doing anything else : http://tinyurl.com/wr3d-wrhd
- Open the WRESTLING REVOLUTION 3D.zip and extract to your WR3D install :
*Go to Steam library, Right Click Wrestling Revolution 3D
Go to properties -> Local Files tab -> Browse Local File
Extract all here, overwriting all files*
- Open the WR3D.zip and extract to your AppData Folder
*C: -> Users -> 'YourName' -> AppData -> Roaming -> WR3D
Extract all here, overwriting all files*
*This will also install the Theme Limit Patch!*