I think it's really just a refocusing of the Green Lantern line after Johns. Two of the books aren't selling well. So they might have just changed direction an are relaunching them to fit a new status quo. John fans shouldn't worry too much. If they wanted to get rid of the others to help Hal they would have done so by now. Hal's been outselling the other Lantern books since he came back.
Also it's not like Cyborg is even doing anything outside of JL for them to have a reason to sabotage other characters for him. Wally West is the only character who ever got screwed by there need to focus on another character.