No bikes in the Olympic Park for the duration of the Games (including Para-Olympics). The Greenway will be shut to cyclist, at least the bit which goes along the Park. The Lea towpath will also be shut starting well before the games. BTW, neither the Greenway nor towpath go through the Park itself, just along side it for a bit. You'll be able to ride your bike to near the Park, but you'll have to park up and join the peds for careful vetting to make sure you're not planning to spend any cash and/or bringing in/wearing anything not produced by one of the sponsors.
Sorry, should that have been in the Rant thread?