"The quality of the signings made this week certainly appears to have whetted the appetite of the Green Army," said Argyle chief executive Michael Dunford.
Season tickets go on sale from Thursday, 4 September to 26 September.
They will be discounted as they will be for 21 games and not 23, with the first match being the likely debuts of Mpenza and Marin against Norwich City at Home Park on Saturday, 13 September.
"All week, our box office has been inundated with calls from supporters interested in buying a ticket for the remainder of the season," Dunford added.