Only speculation but figured I'd post it.
http://weblogs.baltimoresun.com/sports/rav...on_at_home.html
Ravens expected to open 2010 season at home
Based on the Orioles' schedule, the Ravens will likely open at home for the third straight season. The 2010 schedule will officially be announced Tuesday at 7 p.m.
It is believed that the Ravens will start the regular season at M&T Bank Stadium because the Orioles are playing at Detroit on that day. The Ravens and Orioles typically don’t play on the same day because they share parking lots downtown.
If the Ravens’ season opener is at home, their possible opponent is: one of three AFC North teams (Pittsburgh, Cincinnati or Cleveland), an AFC East team (Miami or Buffalo), Tampa Bay or Denver. The Ravens can’t play host to New Orleans (their eighth home opponent in 2010) because the Super Bowl champion Saints will begin the NFL season at home.