Because an MMORPG based the current gameplay models (WoW, EverQuest, Guild Wars) would be considerably lackluster and awkward, I can't foresee this coming together anytime in the next ten years.
What I'd really like to see is Rockstar Games given the SR gaming license, to develop a Shadowrun game for single player experience with a simple, single-mission style multiplayer component, much like what they have going with GTA, Red-Dead, and soon, LA Noir.
Shadowrun needs a physics engine, and Rockstar has the best. The only thing lacking is the ability to switch between first and third person modes, both in and out of vehicles.
Shadowrun needs a huge, cityscape environment, populated with believable NPCs and policemen that will end you at the slightest infraction. Rockstar has been doing this for years.
They pay attention to details, they make games with re-playability that allow you to make decisions that alter the course of the story in subtle ways, hell - they practically created the "do random missions for people willing to pay you" genre of video games, and they don't skimp on the character development and over-arching storyline. Should I even have to mention the downloadable content and the ability therein to play in the same game as an entirely new character?
If SR ever makes it back to the PC and console gaming arena, I think whoever gets it going would do well to take a HUGE cue from what Rockstar has been doing. Make it a success, and the multiplayer component could easily be expanded to something that resembles an MMORPG and even trumps the current model for one.
There are so many other reasons the Rockstar format lends itself to the SR universe - I could literally go on and on.
Last I checked, Smith & Tinker were sitting on the rights. Not sure how long they'll have them, but they'll go back to Microsoft at some point. I'm sure the chances of Rockstar ever getting involved are slim to none, but it would be a dream come true for me, certainly.