I think he was talking about Cypher
I thik this may be Moira in her Life #10, they join forces but later there was a schism between the three of them, two years before the genocide at Genosha.Hickman loves Mags. I think he was sad that Mags is a villain and never should be count as X-Man. Now he will have full rights because he started X-men.
My guess
Year 1: Is Moira´s life # 10 after she decided to break all the rules and tell Charles, it leads to them joining Magneto and later Krakoa.
Year 10: Xavier, Magneto and Cyclops, could be still life 10 of Moira or maybe life 11 as Destiny told Moira she could have that if she played her cards right. This may be the main 616 Marvel Universe.
Year 100: Apocalypse´s eternal war, life #9 of Moira. All the X-men were killed by him including Xavier and Magneto and Apocalypse may have forced Sinister to make Clones of them to be his army. He talked about Logan as if he were his "War".
Year 1000: could be where all the timelines led unless there are some changes made before Nimrod is developed hence why Cyclops mission will be vital for everyone.