"How?" Methos asked blandly, giving the Doctor his best 'I'm trying not to be annoyed by your lack of patience' look.
He wasn't sure he wanted to be involved, but in his experience, wanting to fix things didn't work without having an idea how to fix them. And a plan was usually helpful, as well - but he didn't think the Doctor had gotten to the idea stage, much less far enough to make some sort of plan.