I'm beginning to suspect that Bunker's nemesis is the shadowy gun-wielder depicted on Heavy Plating.
Here's my thought process...
I broke out my first-edition copy this weekend, as some friends had borrowed the EE. While playing bunker, I noticed the figure on Heavy Plating, and realized that he did not seem to be ambuscade (in that he appeared to have a full face visor and hair), and few other villains use guns. I also hadn't seen him (or her)(or it) on any other cards.
I've suspected for a while that Bunker's Nemesis is going to be someone who uses conventional weaponry- maybe top of the line, or just overwhelming amounts of standard equipment. Mostly this is because Bunker (despite being an armored power suit) is still presented as built on conventional (rather than tachyon/BB/Omnitron type superscience. He uses controls. He fires guns. He has armor. His weapons consume bullets. In most ways, he has all the features of an armored vehuicle, it just happens to be bipedal (except in turret mode). His cards and the comics suggest that the Bunker suit requires extensive maintenance and upkeep, and is in a constant cycle of improvement and refinement.
What htis suggests to me is that his Nemesis will engage him on the same terms. The scenario that seems the most plausible to me:
1. A rogue military commander with a crack squad of commandos. Someone able to engage Bunker on a tactical and strategic level (as Tyler Vance is an acknowedged strategic genius), but willing to engage in dirty tricks and sabotage. Someone willing to avoid a stand-up fight until the odds are in their favor, then hit hard. It could be a foreign agent, agents, members of the Block, a rogue military commander (foreign or domestic)...
Its obvious from the creation of Fright Train (see his backstory here) that there are military elements with heavy resources. While the update mentions that the squad was decimated and survivors sent to the Block, it certainly seems possible that the leader would escape to regroup.
The other thing that leads me to believe that Bunker's Nemesis would use conventional weapons is his EE defeated side.
My understanding is that the incap sides ALWAYS happen. Sometimes they don't happen in the "main" timeline, and sometimes they are cryptic or can take quite a while to resolve. they don't neccessarily represent character "death" (though some do), but major points of change in that characters life.
A good example is Expatriette. Her incap side shows her down, and you suspect the worst. but one of the Scholar's cards (Proverbs and axioms?) shows her being helped back up- the scene/setting is exactly the same, just a few minutes later.
Back to bunker. Bunker's first edition Incap shows his armor broken and him climbing out of it. My theory is that this happened during shattered timelines with Bunker's battle against Iron Legacy. We know (thanks to EoW bunker's story) that Iron Legacy killed vance when they fought- and one of Iron Legacy's cards clearly shows him beating original Bunker.
The EE incap side shows Bunker with bullet holes in his face armor. Large caliber, probably armor piercing. Right now, the only villain who routinely uses guns is Ambuscade- and he's Haka's Nemesis. this suggests to me that Bunker has an upcoming MAJOR event where he comes under conventional weapons fire, and he gets the worst of it. Perhaps badly enough that he has to retreat and upgrade his suit with heavy armor (after all, that is the ONLY card that shows the suit with upgraded armor) to withstand their attacks...
Attempted Coup? rogue commander? highly trained commando sqaud?
Take a look at Heavy Plating.