Have the Titans ever interacted with the planet of Draenor? we know that an Old God exists Draenor (Arrakoa BC quests) but is he imprisoned in the same way the Azerothian Old Gods were imprisoned by the Titans?*
I wouldn't be surprised if we find some Old Titan machinery on Draenor, could imagine that Ogres control it but that's probably to repetitive considering that MoP was the last expansion.
It was mentioned that Titans had visited draenor but did not spend nearly as much time there as azeroth so we will see a few remnant structures likely but not much like the 8 bajillion facilities across azeroth. My guess they didn't have to imprison any old gods that may or may not have been on draenor. The summoning thing might have nothing to do with draenor itself as they are interdimensional beings. Possible it was just being brought to draenor.
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Besides its commonly thought that the earth giants that preceeded the gronn might be related to the titans... being named earth giants and all... and they seem to follow the typical pattern of getting smaller and (usually) smarter that some titan related races seem to do. IE - vykrul/humans.