Ed Boon has posted a couple of follow-up tweets in relation to Super NES Mortal Kombat titles on the Wii U Virtual Console. In the context of his messages we don't think these change anything, but they're below so that you can decide for yourselves.
The Wii Virtual Console is, looking back at it now, a seriously impressive collection of classic games. Despite this a mix of issues did hold some particular titles back from the service, often attributable to problems with licensing or even trouble porting games that made use of external cartridge processor such as the Super FX chip. The Mortal Kombat trilogy didn't make it either, in its Genesis / Mega Drive or Super NES form; it looks like we shouldn't hold our breath for that to change with the Wii U's VC.
Ed Boon, co-creator of Mortal Kombat, has stated on Twitter that there's no chance of the Super NES versions coming to the Wii U's eShop platform, while the absence of the 16-bit Sega console on the service and the precedent of the Wii service suggest that the originals, as a whole, can be ruled out.
It's perhaps no surprise that this is the case, and it should be noted that with these titles the Genesis / Mega Drive version were the stronger options, but it's nevertheless disappointing news for fans of these fighting classics.
Thanks to Ryan Millar for the tip