Craig Fairbrass voices three different characters in the series' history (Gaz, Ghost and Wallcroft in that order). If the distinct Cockney accent didn't give it away, they you must be sent to a mental hospital.
Waraabe, and by proxy the African Militia announcer, is Ike Dubaku
Kana Ueda voices in the Japanese dub Vorshevsky's daughter.
Zakhaev in the flashbacks is voiced by Norio Wakamoto. Being Wakamoto, it was easy to imagine that the statue of Zakhaev in Modern Warfare 2 might be actually of Chiyo-Chichi!
And by this [1], we could safely conclude that Sugintou from Rozen Maiden is one of the crew of the AC-130.
What Could Have Been: In spring of 2011, a lot of info about Modern Warfare 3 was leaked. including concept art and the game's plot (You can read it here). While most of the plot is similar to what made it into the final product, there are several interesting differences such as a mission set in the Kremlin and Sandman participating in the final mission to kill Makarov.
