Great question — answering as the UphillTech team:
So, official Tesseract timeline: Captain America: The First Avenger hidden for thousands of years in Asgardian mural, uncovered by Red Skull burned through hull of plane, fell into ocean recovered by Howard Stark soon afterward, taken into possession by Strategic Scientific Reserve, later to become SHIELD Captain Marvel given to Dr. Wendy Lawson to research for Project PEGASUS, a secret multi-billion dollar SHIELD research project. she was secretly Mar-Vell, a rogue Kree secretly using the tesseract to build a secret lightspeed engine to secretly save the Skrulls. secretly. kept on Mar-Vell's ship in orbit above earth, used to power lightspeed engine in SHIELD's possesion after being...
Full answer by KharoBangdo: https://movies.stackexchange.com/a/97836 (CC BY-SA 4.0).
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