The Sony Pictures Universe of Marvel Characters continues to expand at an alarming rate, as the studio just announced Marc Guggenheim is writing a feature film based on the character Jackpot. The news, via Deadline, arrives one day after Sony set S.J. Clarkson as director on the Madame Web movie. The SPUMC is growing, folks. You can't stop the SPUMC. In the comics, Jackpot is the superpowered alter ego of two different women, Sara Ehret and Alana Jobson. Ehret arrived first, created by writer Dan Slott and artist Phil Jimenez for Spider-Man: Swing Shift, a pregnant scientist …