Well the only honest information you're likely to get on sports team revenues is out again in it's annual form. Just the preliminary results are available as yet but some knowledge can be gleened.
It's limited to football, the NFL, but it's not that hard to extrapolate to other leagues-especially when you realize that the NFL is the most profitasble sports league.
The only publicly held team in the US is the Green Bay Packer franchise and, as such, they have to post an annual statement. Here are the preliminary results. I'll post more when the full balance sheet becomes available.
Packers turn $21.4 M profit, but concerns linger - NFL - Yahoo! Sports
JS Online: Packers continue to make profits
The owner's complaint regarding the CBA does seem to have some merit. Only a few years ago each team was able to pay all salaries and expenses just off the revenues received from the TV contract. That's obviously changed.
The Packers are in the smallest market in the NFL but probably have the most loyal fan base-there's an over thirty year wait for season tickets. Preliminary results show the franchise to be just above mid-pack in the NFL so you can extrapolate for your team based on market, stadium, and local revenue sources. None of these guys are going broke but they've been richer. Success continues to be more driven by competence over revenue but the skin-flints continue their historic pattern of struggling.
Some of you do not care for your team's owner-and some of you have good reason. The Packers don't have that problem because they're owned by myself and 111,920 other fans.