Champs webpage has better info:
2017 and Beyond
Highlights:
Champs will be on subsequent weekends, Houston then STL, Houston then Detroit. (First Champs, best Champs. (Also, poor Al, Jess, MCs, etc.))
This is the plan from 2017 - 2020.
No details on regional split or anything like that. One presumes FiM teams and others with DCMPs in Week 7 likely won't be heading to Houston Champs in Week 8. Maybe HQ is going to compress some of the regions schedules to get them into the Houston Champs.