Petruzelli will be fighting for the first time since stopping Kimbo Slice last October at the final EliteXC on CBS event.
Marshall is a former WEC light-heavyweight champion and successfully defended his belt three times.
Nelson last fought on the EliteXC: Heat event, losing to Andrei Arlovski.
Monson defeated former UFC champion Ricco Rodriguez last January via unanimous decision at a Mixed Fighting Alliance event in Miami.
Former WWE pro wrestler Bobby Lashley will compete on the card against an opponent to be determined.
The card will air on pay-per-view for a price tag of $29.95.