Thread:AnnabellRice/@comment-25192437-20190522005012/@comment-16461120-20190522015457

A portal of some sort is always required because they're separate realities and this is how Earth-295, Earth-928, Earth-982, Earth-14412, etc. can all be possible futures of Earth-616 despite the fact that Earth-616 will only have one actual future which we know will be not Earth-295, Earth-928, Earth-982, nor Earth-14412, but Earth-616.