Packing 55,724 spectators into Toronto's Rogers Centre for UFC 129 last April sure sounds impressive -- until you consider that UFC President Dana White wants to fill 80,000 seats for UFC 147 in Rio.

That's the word coming out of the promotion's Calgary press conference earlier today.

UFC 147 is expected to feature a main event rematch between reigning middleweight champion Anderson Silva and his arch nemesis Chael Sonnen. "The Spider" defeated his bitter rival via fifth round submission at UFC 117 back in August 2010.

Their second go-round was initially planned for Sao Paulo; however, logistical issues have forced the world's largest fight promotion to seek other venues, including a yet-to-be-named soccer stadium in Rio de Janeiro that would not only surpass, but obliterate the record for attendance at a UFC event.

In addition to Silva vs. Sonnen II, Ultimate Fighter (TUF) Brazil coaches Vitor Belfort and Wanderlei Silva will go to war along with the program's top two finalists. No specific date has been nailed down as of yet, but UFC 147 is planned for mid-June.

As always, stay tuned to MMAmania.com for more details on this upcoming pay-per-view (PPV) event as they become available.