That’s bizarre. How is he introduced in the remake? That seems all wrong, but maybe it makes sense.
<spoilers>It is wrong by the original story, but Remake doesn’t follow the original story - it is more along the lines of “what if sepiroth projected himself back in time to mess with the timeline and ensure that his original plan succeeds?”. Most of Part 1 features weird ghost things which block any attempt to stray from the original timeline, but they die at the end of Part 1, so I’m expecting Part 2 to go far further off the rails</spoilers>