One of the fun things about novelizations and comic adaptations is that they're typically based off a not-quite-final script, so some orphaned references and the like sometimes have some explanation. (On the other hand, sometimes the author adds his own stuff in that wasn't in any of the scripts.)Those remains had to have been the Dinobots in one of the scripts that got mixed together into the mess we have now. Most of that story got lost in the shuffle, so we're just left with bits and pieces that don't connect to anything. It's unclear who the Dinobots are, where they came from, why Lockdown's clients would want them, or how Lockdown's clients even know they exist. They never did anything as far as we're shown or even told.
What I would give to tour Paramount's vault and see what they've got. There is some version of this story that made sense. Maybe it never got farther than a treatment. But someone at some point had a theory on where they were going with this, and I would love to read it.
TLK and AoE would have benefited from that, I think.