I believe we've passed the point where anyone from the Tower can effectively lead a revolution within the Colony. In order to lead a revolution in the Colony, they'd have to get back into the Colony which is not likely to happen. The Colony is well fortified against human intrusion and even with Victor's knowledge of the defenses, it's not a good bet.

I stated before that if the Tower folk escaped the Colony, Marcus wouldn't lead an attack on them once they were able to escape. I'm not so sure Gatekeeper would actually follow that rule. If he does what Victor suggested and blames M/P/K/V/T/H for the death of Marcus there might be an uproar from the populace and in order to keep them in a happy (oppressed) state, might lead an attack on the Tower.