My idea has always been for Ninty to release an extra-special Punch-Out compilation for the DS. The NES and SNES versions in classic and enhanced modes (enhanced adding touchscreen controls and maybe improved graphics) and the already dual-screened arcade version (pictured above) all in one awesome cart.
As far as I know, there has NEVER been an "official" home release of arcade Punch-Out game (MAME doesn't count). The DS is so uniquely suited to it that it boggles the mind why the fools at Nintendo haven't done it already.
And Ninty not making a 2D Metroid on the DS is another WTF moment.
Sometimes I think Ninty just has their heads up their asses.