Here's the original picture Michael posted on his Twitter with the Lazari:
Per Greg's statement at their Fantastic Comics Q&A, only two Lazari were not present at the Conclave, the Vassalovka and the Inamura. Michael then said that the Vassalovka Lazarus was at the Conclave and illustrated amidst the smaller background figures. The Inamura Lazarus is a "ninja" who, Michael jokingly mentioned, was at the Conclave but was invisible .
Asking Greg about the Vassalovka Lazarus, he mentioned that it was a very scary character and that "he" does not behave well with others so it may yet be the most extreme example of a Lazarus we will encounter later in the series. Mirroring the current geopolitical climate, Carlyle is in a very precarious position with the war starting. Their Eastern border will be the primary conflict with Bittner/Hock and the Mexico border is still contested with Morray, who are on the fence about which alliance to support. Looking at the World Map, Carlyle's Northern Alaska border was illustrated as contested with Vassalovka, who are pro-Hock, so it will be very interesting to see if they are drawn into the conflict.
I'd have to flip through the book at home, but I believe that of the Lazari pictured and shown at the Conclave, everyone had at least a single speaking line with the exception of Carragher & Minetta. Li Jiaolong was definitely the most intriguing of the new Lazari with a peek at his bioengineered cybernetic abilities.
One of the most interesting things that hasn't been elaborated on much is the research that went into creating some of these Lazari. For example, Greg stated having had concerns equipping Xolani Nkosi with a spear as this might typecast him. However, upon additional research, he was able to find numerous examples of very modern advanced spear-headed weapons from Sub-Saharan Africa that are extremely lethal and useful in close combat. Similarly, Sonya Bittner was endowed with a broadsword and armor to honor the family's German heritage. It's great to see the methodology behind the creation of the Lazari, and how they truly represent the "sword" of their families.
Can't wait to see what additional world-building they'll keep putting in the individual issues once the first set of backgrounds has run its course. I'm hoping they'll continue creating new back-page advertisements as well.