I would expect mole machines as well. There is also a mission in which there is a destructible mole machine, so if there was a way to spawn these in an area, kind of like the Rikti invasion EBs, I could see where it could be useful and thematic.
I was also put off by what I see as a breakdown in the tradition of how Nemesis is written, in the story given on the website. IMO, Nemesis should have been surprised that it was Wade who took Statesman down, but Nemesis should then have disclosed that Wade was merely following one of the many possible paths for Statesman's destruction that HE, Lord Nemesis, had planted for other villains to discover and perhaps one day implement. So, in that sense, Nemesis would be the master villain who behind the scenes engineered the demise of Statesman. Which is as it should be.
Mua ha ha! 
Just a short rant: I expected mole machines. I seem to remember some time long ago (before the last time I quit the game) doing a mission on an instanced outdoor map where there were these big Nemesis mole machines. They were a static part of the scenery, you couldn't attack them IIRC, but there they were. Now this Nemesis invasion arrives and I fully expected some giant monster/transport version of the Nemesis Mole Machine for me and others to have to bring down hard using teamwork like a tribe of cavemen felling a wooly mammoth. Instead we got the same Zombie Apocalypse from Halloween with a Nemesis skin on it. It's a let down is all. I mean, I'm not programmer, but I can't imagine it's terribly difficult to take existing graphics files (like they apparently have for Nemesis Mole Machines somewhere) and incorporate them into an event like this. I was half-imagining there would be an honest to goodness Nemesis surface fleet with big ships like in the Sutter TF, and that we'd have to go out into the water to fight them, then click a door and go inside one and fight them in their own boats, but I can see that being too much to expect. The Mole Machines seemed like low-hanging fruit to me, and not to get them (so far...) left me disappointed.