I don't think that ASUS is going to make one, as the market for 11-inch gaming computers is likely not very high. The heat generated by the ivy bridge is well within reason, but the heat even from a good Kepler card is still pretty high. ASUS is likely to have better sales with a 13-inch notebook like their U36 series. It is a little larger, so the heat dissipation is much better, and the 520M is a decent video card.
The dual fan cooling system is what causes the ROG G55/G75 systems to be 2 inches thick. I doubt anyone in the market for an 11-inch system will want something 2 inches thick. The m11x, from what I understand, got pretty warm--and loud!--under full load, leading to less than ideal gaming experience.
Still, I hope they will. I doubt that there is enough of a market for two vendors to make such a specialized product. A G15 with ULV CPU and GT640M would be
sweet.