The Permian basin has dominated recent dealmaking, but other shale plays look set to attract significant investments soon, with about $41 billion of non-Permian opportunities on the market, including the potential sale of Bakken-focused Grayson Mill Energy, Uinta-focused XcL Resources, ExxonMobil's Bakken portfolio, EQT's remaining non-operated Marcellus portfolio and certain Haynesville assets from Shell and BP.