the.com/tent pole

The movie that keeps the studio's lights on, financially speaking.

means A major release (usually a franchise film) that a studio relies on to prop up its whole year's revenue.

from Literal before it was financial: a tent pole is the stake that holds up the canvas, keeping the whole structure from collapsing. Hollywood borrowed the image in the late 20th century — a 'tentpole picture' is the one blockbuster strong enough to hold up the studio's entire release schedule (and balance sheet) around it.

origin
Literally the pole holding up a circus tent
studio math
One flop can cost more than ten indie hits
not sequels only
Can be any big-budget bet, not just franchises
risk profile
Bigger the pole, bigger the collapse if it snaps
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