A quick scan through the LEGO instruction database has revealed that they have updated it with the instructions to all of the San Diego Comic Con LEGO Exclusive buildable sets for 2019!
So for those of us (like me) who have zero access to these sets, the instructions are the next best thing as we could try to build it with the existing bricks that we have. Or make a quick trip to Bricklink.
I was really interested in seeing how they manage to brick build the Flerken but it turned out to be only a cat figure with an attachment at the bottom.
(Special Thanks to Promobricks for highlighting it to me!)