Even if it was a spoiler that somehow slipped out of the Arch's gullet..... wouldn't it be better to assume that its purely speculation so that you can just let it drift on by and not stick to the back of your brains?
Seems like youre looking to be spoiled to me.
thats what I thought several times, too.
I got the feeling that it doesn't matter what you write, there will always be someone who labels it as spoiler.
Plus, there's not even a point freaking out about it. If it is a spoiler, the mods will erase it within a day, because some other manga reader will probably report them.
If it's still around the next day, you know it wasn't a spoiler.