Here is what I know for sure, because most of these theories are total crap based on pure assumption.
The Sheriff is dead. He died in #3, and nobody bothered to revive him. The Sheriff also had nothing to do with the 1337 Krew.
After the Sheriff died, Tricky (the clown, you nubs) took control, and started the 1337 Krew. Jebus is still on his team at this point. Hank makes an assasination attempt at Tricky, but is stopped by Jebus, resulting in Hank blowing himself up. Notice that at the end of #4, Tricky has been blown up, impaled on a stop sign, zombified, and shot in the face several times, and is starting to get pissed off.
In #5, if you pause, and zoom in on the posters, one of them clearly states that the clown cannot die. Hank obviously hasn't been bothered to read these. Also, by now, most of the people are 1337 Krew agents.
When the clown climbs out of a hole in the ground in #5, Hank immediatly shoots him another three times in the face. Apparantly, this causes Tricky to "Lose what's left of his sanity, comprimise reality, and lose control of himself".
So Tricky gains reality defying abilities, such as incredible speed, strength, and the ability to make buildings drop out of nowhere. He then removes Jebus' head. Hank eventually cut's Tricky's head in half, but gets up again, tearing off Hank's head, and smashing it like a watermelon.
In #6, Hank can't be bothered with stealth, (as he has been in the previous episodes), and runs in and immediately starts carnage with an automatic pistol and a sword.
On the train, after Hank has jumped onto Tricky's carriage, and the rest of the train slows to a halt, Jebus can be seen raking leaves next to a sign that says 'Danger! Bridge out ahead! So like, stop going so fast. Or not, I don't care.', and wearing a shirt that says 'Hi, I'm Jebus! This is as dressed up as I get'.
Later, Hank attacks Tricky with an Axe and P90 (awesome combo ^_^), while Tricky was buying a hot dog, before throwing, him off a cliff. As tricky falls it says things like 'NO', 'INVALID', 'CORRECTION' and 'CLOWN CANNOT DIE'. Tricky becomes a spirit creature of some sort. This is pretty much where it cuts off, as 'To Be Continued'.
So stop making wild assumptions people. Read this before you make any more.
Damn that took a long time to type.