Of course, if Eclipso is involved, the villains wouldn’t even technically need all the giant electronics to make others do their bidding.
The only villain that viewers know for sure is dead is Brainwave, with Wildcat having taken him completely out of commission.
Or maybe Shiv completely separated herself from ISA activities during the six-month time jump, and developed a more personal relationship with Eclipso during that time.
So it’s very likely that the surviving ISA members will come together once more, possibly to take a second stab at that whole “control everybody’s minds” plan.