I never actually went into the Body Wars attraction before nor have I ever been inside the building it was located in but I've always wondered what was inside there.
Disney replaced the Mr. Toad ride with The Many Adventures of Winnie the Pooh ride. I like the Winnie the Pooh ride, but Mr. Toad was a much better ride. IMO it was a mistake to remove the Mr. Toad ride and the Alien Encounter attraction from WDW.
Also another great attraction that they removed from Tomorrowland is If You Had Wings which is another attraction I wish I could have rode when it was still there.