i've got some theories about saints row 5
1.the third and fourth games were coma dreams the boss was in between saints row and saints row 2, (i realized i did not come up with this)
2.the zin didn't really blow up earth, they just wanted the saints to lose hope. this would mean oleg, josh, viola, and maybe even zimos lived, (zinyak loves earth culture)
3.a reboot, (lets all hope not)
4.alien gangs on an alien planet,
5.the saints colonize an alien planet and 5 years later gangs form and the saints fight them,
6.johnny gat was put into a coma instead of "dying" in saints row the third by phillipe loren, and the fourth game was all a dream he had. at the start of 5 the saints would find him with the boss not being able to accept johnny's death,
7.the fourth and third games take place in an alternate dimension and 5 is in the sr1/sr2 universe where kinsie, oleg, zimos, and viola exsisted but hadn't met the saints yet. this could bring back the classic gameplay,
8.the saints travel back in time and kill zinyak at the beginning of 5 and then cease to exist but not before telling the president boss to step down. next step would be the saints save gat and fight gangs in washington D.C.,