I think they'll be in round 3 if at all. If they do get roped in, it will be because information comes out about individuals from round 1 and/or round 2 having contact with them as part of an effort to control the narrative. They don't have a lot of value themselves, but adding them into the suit at some point helps make the case against some of the bigger fish and could increase the damages. Any conspiracy (or even strong hint of one) between the writers of those articles and other defendants in the suit is going to be devastating.
There's not too much point in spending a lot of time going after them to try to collect damages. ANN can't afford to pay, and merely dragging their misdeeds into the light will be enough to wreck them. As a former Gawker property, io9 already had most of its value stripped away after the Hulk lawsuit, and Univision just sold the Gizmodo properties (which include io9) after eating huge losses with it.