The Marvel Cinematic Universe is a rich landscape of complex, interconnected mythologies, rightly lauded for its consistency and cohesion. But even the best-constructed, most painstakingly curated tapestry on screen can’t neatly tie off every loose plot thread.
Sometimes planned storylines have to be discarded because of practical concerns – Spider-man very nearly suddenly ceased to exist not that long ago, remember, which would’ve led to a lot of abandoned plotlines.
Source: IGN.com Every Plot Thread the MCU Abandoned