We hit on this one with Mount Hyjal before, but Ironcog brings up an interesting point: why exactly are we going to be mucking around in the old city of Stratholme via the Caverns of Time? In Escape from Durnholde, we're obviously trying to make sure Thrall gets out of the prison camp, and the Infinite Dragonflight is fighting to stop us and ruin history. Same deal in the Black Morass -- the Infinite Dragonflight is trying to keep Medivh from opening the Dark Portal. But in Hyjal, the dragonflight is nowhere to be seen, and we're basically just time tourists. You'd think the Bronze Dragonflight would want us to stay out of there.
Of course, we don't exactly know what's happening in the Stratholme of the past -- maybe the Infinite Dragonflight is causing problems there that we need to stop (or, even better, maybe we'll get to see an as-yet-unknown reason why a Paladin of the Silver Hand, headstrong as he might have been, decided to slaughter an entire town even before he was under Frostmourne's corruption -- maybe there's more to Arthas than we saw in Warcraft III).
But hopefully the Infinite Dragonflight storyline will be continued in some way -- mucking about in time isn't exactly safe, so there should be good reasons the Bronze Dragonflight sends us back to these past events. Watching history firsthand is fun and all, but the lore of the Bronze Dragons falls apart completely if they just start opening up theme parks in the past.