Avellone's
LinkedIn page confirms that he did in fact work with Respawn from February 2018 to January 2019 doing story work, story/character reviews, and cinematic scripts for Star Wars Jedi: Fallen Order. It also suggests that there might actually be a connection between Avellone and the mysterious, maybe-Vampire game that Paradox has been teasing.
The page says Avellone spent roughly 2.5 years under contract as a narrative designer and writer, "working tenderly with other developers," at Hardsuit Labs, the developer of Blacklight: Retribution.
Tender is the name of the faux dating service at the center of Paradox's ongoing ARG, and Paradox is a part-owner of Hardsuit, having acquired a 33 percent stake in January 2018. The studio's website currently lists two games on the go, Blacklight: Retribution, and an
unannounced project.
Avellone's promise of a "big bomb dropping in a month" fits too: A recent update to the ARG implied that some sort of reveal will take place
on March 21, which just happens to fall in the midst of GDC.