That would fall under the "evidence that I've already thought about" mentioned above. My intuitions would undoubtedly be shaken and moved, perhaps in directions that I presently can't even imagine. However, ultimately, I think I would be led to conclude that the whole concept of "oneself" is fundamentally incoherent, and that the inclination to hold any future entity or entities in special regard as "one's future self" is just a subjective whim. (See also my replies to kodos96 in this thread.)