If anything does happen it won't be worldwide or country wide.
I do have a theory. If anything happens, it will likely be within select cities where the effects can be localized and controlled. Then the news of crazy shit happening(videos being uploaded) can then be weaponized against the rest of the country/world. This could be used as pretext to quarantine the vaxxed based upon what happens.
Regardless, my phone will be off and I will be strapped up and ready to put down the zombies, lol.