I've been to places where you can't use a flash. Never got told I mustn't bring a tripod lol
Anyways, I think it's safe to assume that the 1Ds Mark IV is coming soon and Nikon's rumors say two models will be coming. Judging by the past when we got D300 and D3 on the same day in August, I think we're getting a D4 with D400, and of course Canon has to announce a competitor to the D4 sooner or later. Maybe we'll get both, 1D Mark V and 1Ds Mark IV, because the 7D Mark II that could compete with the D400 is really to early to be released.
And 24-70mm seems like an excellent lens to announce with a high body. Can't wait, just a few more days/weeks and we'll see new stuff. My bet is late August (such as 22nd, 23th) and September (around 15th).