Great point, and maybe that's why they're hangin' back with X-O.
Harbinger can be done and presented without going all "spandex-clad" superheroes. Kids with abilities, bad guy in a suit. More sci fi /fantasy, less superfriends. And Bloodshot? Basically a super soldier, so he could be just tactical gear w/ swords.
Save the exoskeleton superhero for once their universe is established. Then breakout the uniforms, capes and action figures? Maybe?
It could be a strategy which ends up being marketable. However Valiant / Sony have got to find a niche that's distinct from Marvel to elicit interest.