Actually believe it or not, the Qualcomm APQ8060 "system on a chip" includes, among many other things, MHL support. So the hardware to support it is certainly there.
Whether or not it is possible to get it working on the software side is another issue.
I do know this much: The Samsung Hercules will use the same SoC that we use, and full MHL support will be included out of the box. There is a slim chance in hell, that somebody could rip the driver blob and apk to work on touchpad android when that comes around. Again, slim chance in hell. Even slimmer chance in hell that the source code would be available.
Failing that (which is likely) somebody would have to reverse engineer the APQ8060 and write a driver themselves. Goodluckwiddat. But hey, it's been done with CM7 on the HTC Evo, so you never know.