www.cbr.com -BY BRIAN CRONIN -In their feature spotlighting 'test runs' of characters & plots, CSBG shows the first time Marvel had Loki and Thor show up in the comics.
screenrant.com -BY RACHEL LABONTE -Avengers: Endgame screenwriter Stephen McFeely reveals Loki's escape with the Tesseract wasn't intended to be a set-up for his Disney+ series.