Character Pack 4 is here and contains characters from various video games
Neversoft Spider-Man
Doom Guy (Retro)
Gray Fox
Guile (2 Outfits)
Ken
Marshall Law (Tekken)
Miles Morales 
Tom Savani Jason
etc

Pack 5 is on the way and will be a small one.
Credit to LynchReborn for letting me port his mods over.