If he could capture a a member, aquire a ring or two. He might be able to work slowly on corrupting them.

I know more about lotr than lanterns but he had a hand, or knew details about their making and how the every magic of Middle earth worked. He is also a spirit, and basically for all intents, Imortal. The lanterns are not. 

Now if he did start, made a small craxk, and started to turn them very slowly over the decades and centuries like the rings of power did, then perhaps. 
Not all could be, the eleves did not. But a slow long game rather than just hacking directly in seems more likely. He had much more time to play with last time. 

In centuries, or so time. The lanterns are ring wraiths, but that's a slow change, darkening them, there nature's and powers slowly over time. More incidious. 

Like to use warhammer 40k. Before the eldar fall, they did not quite so as much notice, the craft worlds however saw far more starkly as they could be in space for decades at a time.

A slow burn that's not noticed, than a. Fast flash.