What examples are there of Hasbro selling entire companies previously along with brands instead of shelving it for awhile before bringing it back?
With how MtG has been doing over the past few years I find it HIGHLY unlikely that someone at Hasbro is angling for a quick sale (I could be wrong, but I simply find it unlikely), especially with the effects on the bottom line MtG has had. The article talks about the boardgames, but the boardgame division of Hasbro, or at least the Monopoly portion, has been outdone by MtG if I recall.
D&D doesn't really enter into the conversation, it's more on MtG which the conversation should focus. Right now I can see some trouble with MtG (the pandemic has made it so it isn't sold in stores physically as much, and the tournament scene isn't able to proceed as it has in the past), but I also expect that there are some very smart people in Hasbro that have been keeping tabs on this. The thing is, I expect AFTER the pandemic ends...(and we all hope it does with the vaccine being distributed) that it will go back to selling really well.
The electronic offerings in MtG cannot be ignored either.
That said, if the vaccine is not a success and the pandemic continues...it COULD signal changes in how things work at Hasbro and there may be some explorations on options to take if that occurs. In that instance, I could see NOT JUST WotC, but several other divisions being shopped (some that may surprise people even, longstanding properties that cannot sell well if there are not physical areas for them to be promoted). The group that has bought out Asmodee and taken control of a LARGE portion of the gaming market probably has ideas of some rather large offers for the WotC portion of Hasbro, and if a sale went through, I could see them reasonably offering enough to make it worthwhile.