What was the setup for John Bull? We were surely going to run into him quite a few more times, yes?
Definitely, and you would still have run into him in any of the timeskips chosen.
John Bull was an apprentice of Edward Kelley, former member of the Golden Dawn and current member of an informal group of villains that would have included Rasputin. All of them have pledged their soul to their respective demons, not entirely unsimilar to the way Wrinkly had a pact with Uridimmu. The goal of these demons were ultimately to spread their influence over the Earth, bringing the world back into the era of myth and legends, gods and demons. There is a tragic story involving John Bull's family that led to his corruption and downfall, but I hadn't gotten around to fleshing it out.