[Tuor of Gondolin]

While I believe I'm in a minority, my view is that a series of movies
based on The Silmarillion would be quite doable, and profitable, somewhat on the
pattern of the Planet of the Apes or Star Trek series. Prime candidates
for such a series would be Beren and Luthien, Turin, Tuor, and the Battle of the Valar (the latter including a kid Elrond cameo and Earendil's voyage.
But the first one could begin with a prologue somewhat like the beginning of PJ's FOTR and then focus on the first two battles of Beleriand.

Of course, such a project might have to wait for an okay by literary successor guardians to CT.