Ok, so the way a heist movie typically works is we see the main
criminal and the main opponent, and then we see the goal of the
heist. Then the main criminal works up a plan in their head (but we
don't see it yet) and recruits other criminals with specific
skills. Then the criminals start preparing and practicing for the
plan. We see some scenes of them preparing for the plan. These scenes
are of varying length and risk, but they're all pulled off
successfully, albeit sometimes with some kinks. We may see some scenes
of them practicing for the plan too. It's not really clear at this
point what the overall plan is, although there may be some subportions
which are clear.

Eventually the plan starts for real. As it goes along, we see the
thing unfold as a whole. A number of twists and turns come up that the
audience didn't know about, but which (at least at the start) are
anticipated and all part of the plan. Eventually things go a little
wonky and get off-track, but the criminals improvise and fix it up.

At the end they end up succeeding, generally, and then we see if they
really succeeded and how well they did.

The criminals tend to have a special skill they're good at, some
connections to people or objects or organizations that is useful for
preparation, some history with other members of the team (particularly
the main criminal and the main opponent), and some character flaw or
history problem or something that can bring them down.

System-wise, this lends itself pretty nicely to a thing where the GM
sets the goal and the main opponent, then the players make a plan and
make characters. The players play out some scenes where they prepare
stuff, which gives them special equipment (the pinch in ocean's 11) or
dice into the plan pool, or practice stuff, which gives them dice into
a pool for the practiced scene. Then we do the run. People run through
the plan, and can draw on the plan pool dice to simulate eventualities
they had actually planned for (although there has to be some relation
with stuff they prepared). If they fail a roll, then we go
off-plan. There are some kind of time limits or something where
failure dice get racked up until the players hit the objective, or
they can scrap the objective and go on to the next one. Eventually
they make it to the end  (we hope) and then we do a final roll-off
based on the number of failure dice vs the number of pool dice left,
or something, and everyone narrates how they turn out based on that.