So when you reboot a game and (a) your team consists of none of the original members, (b) you change the tone entirely, and (c) you actively crap on your pre-existing fanbase in favor of some nebulous Twitter-based audience that may or may not (probably not) exist, your game sells poorly? Shocking!
The only way to get out of this is to make a Saints Row 5, where in universe this game was a streaming TV show that the Saints (possibly Pierce) licensed to a Netflix-style service. It opens with the Boss and the Saints watching it in their massive home theater and they all hate it.
The Boss - "Where's the extreme violence?"
Pierce - "Where's the titties?"
Kinzie - "Where's the dongs?"
Johnny Gat - "Where's me?
Shaundi - "Student loans? Who, other than Kinzie and Oleg, went to college here?"
Pierce - "I got an honorary MBA. Does that count?"
The Boss - "Saints, call up our agents, social media reps, and lawyers. We got business to take care of."
Anyhoo, the agent and social media rep set up a big press conference to address the shitty response wherein they promise no longer ignore their long term fans and indicate that the Saints will do whatever it takes to stop production on season 2 of the show. Shortly thereafter, the lawyers deliver a laptop to the Netflix execs where the Boss demands they return the TV rights back to the Saints. The execs refuse and then the Boss dives out of a helicopter and massacres the TV Saints cast and crew while they were trying to film season 2. There's your intro mission. Boom. I'll take my check now, please.