The Wii has absolutely NO BluRay support! That's a Sony licensed format, so Nintendo won't even touch it (as they don't want to pay a rival to use their technology on their system).
The Wii does have a DVD-ROM drive, but Nintendo did not bother to include DVD-Video support with it (which would have added $5 to the system's price & they would have to develop their own app for it)... so you have to softmod your Wii to add that support, should your Wii support it (as newer systems don't).