The confirmation of West Ham United as tenants at the London 2012 Olympic Stadium sparked a lot of feelings, and the most common one was uncertainty.
Even those of us fortunate enough to attend an event at the East London venue last summer for the Olympics or Paralympics and saw the interior and exterior first-hand cannot really imagine what it will be like as the home of The Hammers.
The truth is, nobody will really be sure until 2016/2017 when the changes are made and football kicks off in the Olympic Park. But until then, we thought we would compare and contrast 10 centrepiece stadia from the last four decades of Games.
We start way back in the early 70s - 'Then' photo is followed by 'Now'...
1) Olympiastadion, Munich 1972
Enjoyed a spell as home of Bayern Munich and 1860 Munich until the Allianz Arena came along. Hosted the women's Champions League final in 2012 while the Allianz welcomed the men.
2) Stade Olympique, Montreal 1976
The famed 'White Elephant' stadium still has the occasional marquee usage, such as when MLS side Montreal Impact play host to local rivals in big derbies.
3) Grand Arena of the Central Lenin Stadium, Moscow 1980
Continuing the theme of transitions to football, the site is now Spartak Moscow's Luzhniki Stadium after many changes over the years.
4) Los Angeles Memorial Coliseum, California 1984
Part of a frugal Olympic bid on two occasions, its legacy as a multi-purpose stadium transcends both LA Games and college side USC Trojans have been residents for 90 years.
5) Jamsil Olympic Stadium, Seoul 1988
Though its sporting legacy is not as strong as its peers, Lady Gaga performed to a crowd of 51,684 there only last year.
6) Estadi Olímpic Lluís Companys, Barcelona 1992
The former home of Espanyol in La Liga now waits upon visits from the informal Catalonia national side and rugby league's Catalans Dragons.
7) Centennial Olympic Stadium, Atlanta 1996
Site of the landmark Games is now owned by mogul Ted Turner, and the revamped and redubbed Turner Field is the home of Major League Baseball's Atlanta Braves.
8) Stadium Australia, Sydney 2000
Now a mecca for native sports, including State of Origin, NRL, AFL and Big Bash League - including a crowd of over 84,000 for a SoO 2012 contest.
9) Spiros Louis, Athens 2004
The pre-existing stadium, renovated for '04, was a recent host of the Red Hot Chili Peppers and the 2007 Champions League final.
10) Beijing National Stadium, Beijing 2008
Though its legacy has yet to reach five years of age, football giants such as Arsenal and Manchester City have contest pre-season matches here and Serie A made it the home of its 'Supercoppa Italia'.