User blog comment:PUNCHURPREGNANT/Gray and Silver Predictions/@comment-135.0.27.38-20140111155246/@comment-4829046-20140111172131

But those reasons aside, correct me if I'm wrong but wasn't Natsu also surprised when he found that Richard was Wally's brother? :/

Just saying that while those theories could work, it would still be quite the stretch. Mashima doesn't plan everything in FT so far ahead.