I thought that happened, right here, years ago?
Not that I recall, which is why I'd like to see a citation. I don't doubt that a few folks here have claimed that D&D was expected to become a core brand, but I'd like to see citation that someone from WotC said so before I believe it.
Isn't it moot at this point, anyway, as they're no longer using the same strategy?
In one sense, it is moot, yes. However, lingering suspicion that Hasbro directly meddles in, or passively influences, the development of D&D persist, and some continue to interpret what we observe on that basis. If we had direct evidence, that'd be helpful. It we have to admit that we don't have direct evidence, that would also be helpful.