WWF War Zone was the first 3D WWF title to be released, developed by Acclaim Studios Salt Lake and published by Acclaim Entertainment in 1998 for the PlayStation and Nintendo 64. As Andrew has noticed, there were some beta screenshots in an issue of Game Informer (?) with Star Wars: Masters of Teräs Käsi on the cover. At the time, the game was simply referred to as WWF ’98. This beta version has no health bars yet, the ropes are red, white, and blue instead of just red, and the arena has American flags. There was a beta video on Youtube but it seems to have disappeared.
Thanks to Andrew McMahon for the contribution!