I have been tracking the process of catching the console version up to PC/Mobile over here for the last few months:
Based on what I have seen, there is no reliable way to know when specific troops are coming. At this point, the critical thing is that we are waiting for Microsoft to approve the 3.0 patch. Until that is released, we don’t even know if there are any troops available to release, but once it is, I expect a flurry of new troops. The newest kingdom Suncrest will probably be released in the first or second week after the update, and Adana is the other big one that I would expect in those two weeks. We’re only 5 events behind, so they can catch up in just a few weeks by adding bonus troops to the events. Until the update is approved, there isn’t much point speculating.