Everybody here talks like they KNOW, deep down in their hearts, what Hasbro is going to do -- but your main assumption is completely and utterly wrong.
WoTC is not D&D to Hasbro.
WoTC is Magic: the Gathering.
And Magic is a freakin' license to print money. And it has been going on for 23 years!
Why would they get rid of D&D? They finally got it right where they want it. Small staff printing a couple pretty Hardbacks a year, an OGL that throws money back at them for very little overhead, it is perfect.
Everybody is happy.
And the Magic Gravy Train just keeps on chuggin' along...