Wrestlemania 7 was originally scheduled to be at the Los Angeles Memorial Coliseum.
However, it was changed to the much smaller Sports Arena.
WWE stated at the time that it was for security reasons (as there was allegedly a threat issued against them concerning Slaughter's portrayal of an Iraqi sympathiser or something like that) but the general feeling is that ticket sales were very slow so rather than have a Coliseum with loads of empty seats, they moved it to the Arena.
Imagine 100,000+ people, would've broken the prior 93,173 record. Imagine NO MORE. How WM VII would've looked at the LA Coliseum.