Why doesnt Bishop recognize Archangel ?
When Bishop first meets the X-Men in Uncanny X-Men #283, he almost believes them to be the legends of his time, but Archangels appearance ticks him off. In his future there exists no records about Warrens blue skin and his metallic feather blades. This could be an indication that Warren might regain his original appearance one day, however he is still blue and metallic during the Onslaught saga, which was the point where the X-Men died in the XSE future. On the other hand the documents about Warrens transformation could simply have been lost over time, or Bishops future always was an alternate timeline and all the changes he and the XUE made are effortless when it comes to altering their future timeline.