By the looks of it, Microsoft are seeking out potential buyers for Microsoft Entertainment Studios. According to TheHollywoodReporter, negotiations are ongoing between MS and Warner Bros over a possible deal.
However, a Warner representative commented that the company is "constantly having preliminary discussions regarding business opportunities with numerous companies at any given time." So, nothing concrete to report as yet then.
The planned closure of Xbox Entertainment Studios was confirmed just last month, however there are still some projects in development, such as Quantum Break, which won't be affected.