The Antichrist is supposed to have all sorts of fantastic powers, and all sorts of devious means of influencing the masses. That's a lot to live up to. I wonder how well he will handle the weight of expectation. Let's face it, this is someone who's going to be pressured from birth by a domineering father to do no less than take over the entire world. That can't be a healthy upbringing. Personally, I think he'll end up being a reluctant celebrity, who struggles with drug and alcohol addiction, which is his only escape from all the unsolicited attention from the masses who are all expecting him to live out a life pre-planned in advance which he had no say over. He'll eventually get so frustrated that everybody only sees him as the harbinger of the apocalypse, and not the person he really is, that he becomes a virtual recluse, who is occasionally grudgingly corralled into the odd media interview, but would much rather be left alone. In his remote shack in the middle of nowhere, he is finally able to engage in his true passion, and after many years, under an assumed name, he fulfils his dream of becoming a highly successful science fiction author. Through interactions with his publisher, he is able to eventually meet a few people who are unaware of his true identity, who wish to associate with him because they are impressed with his writing, rather than his supernatural status. With true friends for the first time, he is finally able to overcome his problems with drugs and alcohol. Eventually, the media manage to discover the true identity of this best-selling author, and the people are amazed at what the harbinger of destruction ultimately ended up doing with his life. Though reluctant initially to engage with the media, the Antichrist now discovers that the people are now just as interested in the characters, plots and settings he created in his novels as they are in his alleged 'destiny'. Convinced that the people now are at least prepared to see him as the person he is, the Antichrist takes the opportunity to use the attention to launch a series of self-help books for people dealing with the pressures of expectations. He then respectfully asks that the media leave him alone, but makes the occasional appearance to promote his charities, which are aimed to help those who have gone through similar experiences to him. As the first of his novels is made into a spectacular blockbuster movie, the Antichrist is now much better adjusted and happier, splitting his time between writing his books, visiting his friends, and running a support group for other demigods who have also been led to dependence on drugs and alcohol as a result of public expectations and domineering parents, and his story is held up as inspiration for others.
Of course, that's all very speculative. It's entirely possible that the Antichrist might be unable to deal with his issues, and suffer the same tragic fate as Michael Jackson and many other celebrities. I just preferred to focus on the possibility of a more positive outcome.