We can visit the site www.rataalada.com from The Batman post credit scene and it has some message from Riddler I believe. I was able to download a ZIP file from
the-bookshop
scarecrow
the-chronicles-of-narnia
super-friends
a-scanner-darkly
nothern-exposure
the-commuter
curse-of-the-golden-flower
naked-and-afraid
the-squid-and-the-whale
homecoming
pet-sematary-2019
the-parallax-view
killer-elite
funny-games
planet-of-the-apes-2001
magnolia
birds-of-america
phantoms
war-dogs
titanic
brave
it-follows
jeeves-and-wooster
tumhari-sulu
project-x
the-irishman
a-dogs-purpose
title-sequence
raavanan