After the failed attack on Al-Zawahiri (though QUITE successful in killing some scumbags!) Al-Jizzra played a tape of Zawahiri reading "an ode to martyrs". Some commentators believed that this was in fact an obituary to Zawahiri - we now know that this was false (Zawahiri is still alive). If it wasn't an obituary, could it have been an ode to "future" martyrs?
Then we get bin Laden offering the US a "truce". This is (was) SOP for the Muslims before attacking the Crusaders.
Now (today, Al-Jizzra publishes the rest of Zawahiri's video tape) we see him offering Bush the chance to "convert to Islam". Again, this was SOP for Muslims fighting the Crusaders prior to an attack.
All the signs are there.
if anything "big" occurs, it will be overseas.
if anything happens in Detroit, it will be Paris style car burnings by the local islamofascists during the game, in the hopes of attracting media attention.