The TRAPPIST-1 system hosts seven terrestrial-sized planets, in and around the habitable zone of their small M dwarf host star. Since M dwarf stars exhibit a long superluminous pre-main-sequence phase during which its planets likely experience extreme volatile loss, the TRAPPIST-1 planets may have highly evolved, possibly uninhabitable atmospheres. Resultant possible atmospheres may be post runaway atmospheres like Venus, dominated by CO2, or be dominated by O2 as a result of severe water loss. These atmospheres exhibit spectroscopic signals in transit that may be observable by the upcoming James Webb Space Telescope.