The Big House

The Big House was a super prison specializing in criminals whose genetics have been altered. It was designed by Hank Pym, and the inmates were shrunk down to action-figure size. While administered by S.H.I.E.L.D., the shrunken prisoners are attended by synthezoid guards, also designed by Hank Pym. The Big House was one of the super-prisons destroyed when all four prisons suffered a simultaneous security system failure, cause currently unknown.

Synthezoids

 They bear a disturbing resemblance to Ultron...