Will the Roman Catholic Church Enforce a Sunday Law?

Yes.

According to the book of Daniel, the 4th Beast has these characteristics:

Daniel 7:25 King James Version (KJV)
25 And he shall speak great words against the most High, and shall wear out the saints of the most High, and think to change times and laws: and they shall be given into his hand until a time and times and the dividing of time.

Here are some quotes of the Roman Catholic Church speaking great words against the most High:

[Insert Quote Here]

In the Dark Ages, the Roman Catholic Church wore out the saints of the most High by killing them by burning them, boiling them, torturing them, etc:

[Insert Quote Here]

The Roman Catholic Church even thought to change times and laws, by claiming to change the Sabbath Day from Saturday to Sunday:

[Insert Quote Here]

THIS ANSWER IS NOT EVEN 1% COMPLETE, BUT WILL BE COMPLETED SHORTLY.