My favorite way to use TPM as a prologue is what Octorox did:
Open with logos and “a long time ago in a galaxy far, far away.” Right when it’d normally cut to the STAR WARS logo, instead cut to the wide shot of the duel of the fates (the beginning of the scene where Maul kicks Obi-Wan a few shots in). Throughout the duel, such as when Qui-Gon sits to meditate and when Obi-Wan is trapped behind the laser walls, we flashback to the key events of TPM centering on finding Anakin.