Prerequisites:
1. Rooted phone.
2. Very little knowledge of system partitions.
3. 15mb free space in system partition.
Installation method:
1. Download marvel-dc bootanimation.zip
2. Delete existing "bootanimation.zip" from /system/media/ using any root enabled file explorer. (I use es file explorer).
3. Copy "marvel-dc bootanimation.zip" to /system/media/ and rename it to "bootanimation.zip".
4. Change the permissions to -rw-r--r--
5. If you are using CM themes then keep the bootanimations field to system default.
6. Enjoy
NOTE : Will work best on 720p resolution displays
ORIGINAL THREAD : LINK