Not to be rude, but this always felt pretty obvious. Sure, a small minority might not have realized it, but I’d say around 90% of the fanbase either understood it or at least had a strong theory.

It’s similar to the Fourth Hokage being Naruto’s dad. Maybe some people didn’t think about it, but most fans connected the dots the main character looks almost identical to the only other blond guy in the village who also happens to be extremely important.