Harvard announced last night that they have made a deal to buy the Supply New England property between Seattle and Windom Streets. Harvard doesn't own it today, but the deal means that Harvard will own the property in no more than 10 years.
(this is a correction to a previous version of this post which said that Harvard already owns the property)
Also, Harvard stated that they will not purchase any property in A/B for the next year. Considering Harvard's dire financial situation, it doesn't come as much of a surprise that they will spend their limited resources on their current campus instead of more property that won't be developed for decades.