Although he's currently playing a big bad vampire on HBO's True Blood, Christopher Meloni is now set to play a big, bad CEO in David Wain's rom-com spoof, They Came Together. The picture reunites the Wet Hot American Summer director with stars Paul Rudd and Amy Poehler. Poehler's character runs a small knick-knack shop that is about to go out of business thanks to Rudd's company.  THR reports that Meloni will star as Rudd's boss, the CEO of CorporateCo Coporation and Co, Inc.  Written by Wain and Michael Showalter, the picture plans to wrap up casting and shoot this July.  They Came Together also stars Ed Helms, Michael Ian Black, Jason Mantzoukas, Cobie Smulders and Noureen DeWulf.