An operation like the MU investigation and raid takes many months, if not years, to plan and execute, especially when it involves cooperation with officials in several countries.
It is almost impossible that the timing had anything to do with SOPA, considering that the SOPA defeat was rather unexpected.
It did not seem like they were prepared very well, since they couldn't even get the paperwork right for the arrest. That does not look like something well planned at all.
It is almost impossible that the timing had anything to do with SOPA, considering that the SOPA defeat was rather unexpected.